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EDUCATION POLICY ANALYSIS ARCHIVES A peer-reviewed scholarly journal Editor: Gene V Glass College of Education Arizona State University Copyright is retained by the first or sole au thor, who grants right of first publication to the Education Policy Analysis Archives EPAA is a project of the Education Policy Studies Laboratory. Articles are in dexed in the Directory of Open Access Journals (www.doaj.org). Volume 12 Number 52 September 24, 2004 ISSN 1068-2341 School Size and the Influence of Socioeconomic Status on Student Achievement: Confronting the Threat of Size Bias in National Data Sets1 Craig B. Howley Ohio University ACCLAIM Research Initiative Aimee A. Howley Ohio University Citation: Howley, C. B. & Howley, A. A. (2004, September 24). School size and the influence of socioeconomic status on student achievement: Confronting the threat of size bias in national data sets. Education Policy Analysis Archives, 12 (52). Retrieved [date] from http://epaa.asu.edu/epaa/v12n52/. Abstract Most of the recent literature on th e achievement effects of school size has examined school and district performance. These studies have demonstrated substantial benefits of smaller school and district size in impoverished settings. To date, however, no work has adequately examined the relationship of size and socioeconomic status (SES) with students as the unit of analysis. One study, however, came close (Lee & 1 This research was partially supported by grants from the National Science Foundation (Grant No. 0119679) and the Rural School and Community Trust. Any opinions, findings, and conclusions or recommendations expressed in this report are excl usively those of the authors and as such do not necessarily reflect the views of the National Science Foundation or the Rural School and Community Trust.
School size and achievement 2 Smith, 1997), but failed to adjust its analyses or conclusions to the substantial bias toward larger schools evident in the data set used. The present study, based on the same large data set, but with size issues in the rural circumstance clearly in focus, reaches rather different conclusions, extending previous work for the first time to a more adequate examination of size effects on indivi dual students. Findings challenge assertions about ideal and minimum size. Analyses include comparison of means and multi-level modeling. Met hodologically, the study illustrates the challenge of using nationally representative data sets of students to investigate second-level contextual phenomena, such as school size. When aggregated to schools attended by nationally representative students, the result cannot be a nationa lly representative set of schools. Adjustment with weights to simulate such a distribution, moreover, is inadequate to overcome this threat if one is interested in investigating size relationships among the smaller half of US schools, as one must be in seeking to generalize results to the nation as a whole. The present study finds that the smallest nati onal decile of size maximizes the achievement of the poorest quart ile of students. Moreover, appropriate size is shown to vary by student socioeconomic status. Practical and scholarly interest in the relationship of school size to student achievement has one of th e longest histories of any issue related to schooling, but the record of research accomplishment over that span is not impressive. Stemnocks review of the literature (Stemnock, 1974) traces interest to the turn of the 20th century, but even as recently as 30 years ago, when that review was written, most educational researchers held that larger size was preferable. Since 1974, however, theoretical and empirica l perspectives on size have gradually altered, so that scholarly judgment now generally favors smaller size.2 In the current view, as well, an impressive array of benefits is often claimed for smaller size, just as an impressive array was once claimed for larger size (cf. Co tton, 1996). Much, however, remains to be learned about the influence of size, and a wi de range of issues remains to be addressed.3 Many of the claims currently made are difficult to warrant empirically. The study reported here addresses one of the many remaining issues. The urban small schools movement, moreover, comes inscribed with a variety of pedagogical and curricular reformist practices, and the upshot is that these pedagogical and curricular options have often been confounded, ev en in evaluative and research work, with the structural influence of size (e.g., Darling-Ha mmond, Ancess, & Ort, 2002; Fine & Somerville, 2 In fact, however, average school size is not declining in the US, and schools in rural and suburban areas probably continue to grow in size (DeYoung Howley, & Theobald, 1995) due to consolidation efforts and the failure of policy makers to attend to rural concerns. 3 The best evidence concerns participation in co-c urricular activities; dropout rates; and achievement (level, growth, equity, and achievement cost-effi ciency), with a strong preponderance of evidence favoring small schools.
Education Policy Analysis Archives Vol. 12 No. 52 3 1998; Lee & Smith 1995). Before turning to details about the present study, readers should note well the divide that exists between urban and rural concerns over size. Much of the current prescriptive literature on small schools (we prefer the comparative form, smaller schools ) promotes administratively difficult reform initiatives to personalize huge city schools by creating schools-within-schools (AIR and SR I, 2003). These small schools are often perhaps usuallymore simulation than reality, because within-school schools are seldom free to behave like the (real) autonomous school s that have been studied by school size researchers (e.g., Raywid & Schmerler, 2003).4 Some researchers believe that size itself is merely a somewhat tangential framework for pra ctices, and it is practices, not structures per se, that produce results. In rural areas, by contrast with the refo rmist intentions of urban small schools, the practical work centers on difficult efforts to fo restall, in the various states, policies that structure wholesale closure and consolidation of actually smaller schools in which pedagogical and curricular changes are in no way tied to the issue of size per se. Some leading urban educators nonetheless ha ve a good grasp of the differences and the commonalities of the struggles in both rural and urban settings (e.g., Klonsky, 1995; Raywid, 1999). In general, these commonalitie s concern the way educational systems serve students from impoverished backgrounds. More typically, however, urban educators who strive to turn a big-city disaster of 3,000 students into four units of 750 students find it difficult to entertain the possibility that such a seemingly desirable (not to say ideal ) size might be too large in a rural community. This inference is understandable, and understandably attributable to ignorance about rural places. If, however, researchers responsive to the urban challenge over-generalize their findings to valori ze one particular reform package (i.e., smaller schools with constructivist pedagogies), they risk doing damage in rural places. Problem Statement Most of the recent literature on school and district size rests on analyses using the school and the district as units of analysis.5 In contemporary circumstances, the choice is a 4 The SWAS phenomenon perhaps rests on the dubious assumption that small size harbors effective practices that can be used anywhere, even in larg e schools. This probable assumption likely emerges from the legacy of the school effectiveness movement, the aim of which was to identify the practices of effective schools and propagate them in other, not -so-effective schools. Some of that literature, indeed, identified size as detrimental to achievement. If one is implementing a range of reforms in a large school, and smaller size is among the recomm endations, the natural (if illogical) response is some administrative arrangement to simulate smaller size. The dilemma is that smaller size actually requires the disestablishment of larger schools, and vested interests being what they are, the requirement is received as far too radical. In other words, resistance is very strong, and this resistance is probably as strong in rural as in bigcity settings. The rural-urban difference is merely that mega-schools are less common in rural places than in big cities and their suburbs. 5 Lee and Smith (1997) is one of the few exceptions but it has never been replicated. As will be shown, moreover, applying the findings of this technically and conceptually fine study to policy decisions in the states is problematic, especially in the case of rural schools and districts.
School size and achievement 4 logical one because test scores aggregated to schools and districts commonly serve as grist for the accountability ratings dispensed by the states,6 and these studies tie the research conveniently to accountability issues, since they assess school and district performance, the focus of nearly all accountability judgments. These studies most commonly show that the direct relationship of size and achievement is zero or modestly negative, and that an interaction between size and SES mediates the di rect relationship. This mediation often changes the negative relationship of size and achievement into a positive one for schools and districts exhibiting the highest levels of SES. In general, however, studies have not advocated any size as universally best (with one excep tion, Lee & Smith, 1997), and the poorer the community, the smaller should schools and dist ricts be; see Howley (2002) for a thorough review of the literature relating size, SES, and achievement. The findings about interaction effects are observable across 12 replications or nearreplications and are comparatively robust. N onetheless, no work to our knowledge has yet adequately examined the relationship of size and SES with students as the unit of analysis. The most prominent individual-level analysis is the aforementioned study by Lee and Smith. This study will be considered in detail in our review of the literature because its conclusions are flawed with respect to its own findings a bout smaller schools. In any case, none of the previously published work, even that conducted with students as the unit of analysis, including the first authors own previous work with in dividual students (Huang & Howley, 1993), represents an adequate investigation of SES as a mediator of the influence of size on the achievement of individual students. Part of the difficulty of studying this issue is the challenge of securing appropriate data sets. Most data sets available from State Ed ucation Agencies represent schools and districts and not students. This situation is inevitable because confidentiality of individual students must be carefully protected. In the rare case s in which researchers can access achievement information about individual students within a state, however, individual-level SES measures are most often absent, and when present are lik ely to be dichotomous (eligibility for subsidized meals). The principal alternative for such study is one of the large, nationally representative databases on students. These data sets, as we will suggest, present rather predictable challenges to school size researchers concerned to study the interaction effects of size in rural places. Related Literature: Overview For most of the twentieth century, small size was considered to be an impediment to school improvement, as suggested above. Beginni ng with the rise of the railroads as large 6 Huang and Howleys 1993 study is an exception in this line of research. That study found that an interaction effect of size persisted in regression anal ysis after the introduction of several blocks of control variables related to student academic back ground, school climate, and school resources. The unique feature of this study was that it examined students in Alaska (the universe of students tested at the applicable grade levels) who had attended th e same school for four consecutive years. This selection rule is arguably one that allows for a better test of the hypothesis. The weakness of the study is that it did not employ a multi-level or equivalent ANCOVA model, arguably deflating standard errors. The large number of control va riables, as well, seems problematic as well in hindsight.
Education Policy Analysis Archives Vol. 12 No. 52 5 firms, the organization, per se, of an enterprise began to be understood as enhancing or detracting from productivity. Such efficiencies, the thinking ran then (as it still does), could be realized most immediately as economies of scale: the larger the firm (or school, or school district), the more opportunities existed for ef ficient organization and probable improvement in productivity (specialization, volume purcha sing, supervision and staffing, and so forth). School and district consolidations were thus linch-pins of the school improvement agenda of the first three-quarters of the 20th century. In rural areas professional educators believed that school reform was a literal hostage of consolidation (Cubberley, 1915/1922) and that improvement was highly improbable or altogether impossible without it. For instance, writing in the early 1950s, Ju lian Butterworth and Howard Dawson asserted: School consolidations and school district re organizations, being made necessary and desirable by changes in agricultural produ ction, new means of transportation, and new needs for education, have resulted in decr eases in the number of schools and school districts and increases in the size of both. To the new rural school has come a new type of administrative leadership which has stimulated the improvement of the educational program and at the same time has been partly the product of the new conditions. (Butterworth & Dawson, 1952, p. 3) Even at mid-century, however, nearly half of rural schools were oneor two-teacher organizations and not much organization for the purpose of efficiency could be accomplished with them, at least in the view of the rising class of professional educational managers. Although consensus about consolidation wa s strong by mid-century, differences of opinion still prevailed, then as now, and research re sults also varied. In particular, the issue of what size might be appropriate had been va riously determined in opinion and research. Ellwood Cubberley (1915/1922), working at Colum bia Teachers College in New York City but writing about rural schools, argued, on one hand for sizable graded schools and even larger high schools. Joseph Kennedy (1915), on the othe r hand, dean of education at the University of North Dakota, endorsed schools that were ve ry small, then and now, by urban standards.7 As actual research began to accumulate in the field of education, however, this difference of perspective about appropriate si ze persisted. Stemnock (1974) summarized the results of nearly 120 studies conducted between about 1924 and 1974 for their recommendations about optimal school size. Mo st of the studies that focused on costs or curriculum (inputs) called for increases in school size. For example, at the high school level, Stemnock reported nine studies carried out betwee n 1924 and 1974 that focused only on costs. Six specified an optimal high school size or si ze range, averaging about 1,100 students. Six that examined course offerings advised an optimal school size of about 1,200. These figures, in fact, became the midto late-20th century norm. Eight studies, however, examined student achievement. Six found no difference in the achievement of students from small and large senior high schools, and only one recommended 7 Kennedy wrote that a school with 25 children actively engaged by their teacher exhibited a fully adequate size.
School size and achievement 6 an average high school size: 400-800 students, or about half the size recommended by studies focusing on input variables (see Stemnock, 1974).8 Howley (1996) described three episodes of size research since 1974: (1) studies confirming no significant differences, coming hi storically first and perhaps concluding around the time of Stemnocks review; (2) studies findin g modest achievement bene fits of smaller size, with such findings arguably emerging cont ingent on 50 years of school and district consolidation; and, most recently, (3) studies tes ting the hypothesis that the relationship of size and achievement is mediated by SES. Since 1996, there have been at least 12 state-level investigations9 of the interaction hypothesis (i.e., replicating and extending Friedk in and Necocheas 1988 analysis of California schooland district-level data). Most of these st udies show effect sizes, under some conditions quite large, favoring smaller schools and smaller districts in impoverished communities, with effect sizes increasing to the extremes and with net negative effects over much of the SES range. They also show, more substantially and mo re consistently from state to state, that the relationship between SES and achievement is substantially weaker among smaller schools and districts as compared to larger schools and districts (again, this is a relationship among schools and districts, not among students).10 The interaction hypothesis has not received much attention from researchers studying student-level data. There are di fficulties confronting those interested in such work. A data set carefully constructed to be nationally represen tative of students will not necessarily be representative of the size of schools. If sm aller schools, for example, are defined as those enrolling less than the median enrollment, cont emporary students will typically attend larger schools.11 If the research focus is context but the data set was not constructed to be 8 Lee and Smith (1997) commend a quite similar range (600-900 students). There are many unacknowledged conceptual and practical difficultie s in the attempt to specify one-best solutions, not the least of which is the likelihood that th e good is contingent, limited, contestable, and ultimately political, as Socrates discovered. 9 Abbot, Joireman, & Stroh (2002); Alspaugh & Gao (2 003); Bickel (1999a); Bickel (1999b); Bickel & Howley (2000); Bickel, Howley, Williams & Glascock (2001); FoutsFriedkin & Necochea, (1988); Howley (1995); Howley, (1996a); Howley (1996b ); Howley (1999a); Howley (1999b); Howley & Bickel (1999); Huang & Howley (1993); Johnson (2004); Johnson, Howley & Howley (2002); Miley & Associates (2003). The states involved, and the number of works for each, are: Alaska (1); Arkansas (1); California (1); Georgia (2); Missouri (1); Montana (1); Nebraska (1); Ohio (1); South Carolina (1); Texas (3); Washington (1); West Virginia (3). 10 Among these studies, the strength of the net size influence (the sum of direct and interaction effects), varies considerably by state, by grade leve l, by locale, and by unit of analysis (i.e., school versus district). Results of these replications have been repeatedly summarized in the studies cited in the preceding footnote (full citations appear in the reference list) and w ill not be detailed here, as it is the overall pattern of these 12 cases that is germane, and the relative absence of student-level analysis. 11 In fact, if any population of schools is divided at the median of size, the larger half will always enroll more students than will the smaller half, so long as size is defined by number of students enrolled.
Education Policy Analysis Archives Vol. 12 No. 52 7 representative of context, or if the context of the average student is erroneously construed to constitute the representativeness of context, th e findings and conclusions about the contexts can easily exhibit dubious validity. This threat will be a strong one if (as in the present study) one is interested in unrepresentative contex ts that are disjunct with national patterns.12 Analysts of school size who use national data sets representative of students, but not necessarily of contexts, should remain alert to this threat. Relevant Literature: The Lee and Smith Study A commonly cited study in the school size literature examined mathematics and reading gain scores from the 8th to the 12th grades, using NELS data nationally representative of the cohort of students completing the 12th grade (Lee & Smith, 1997). We critique this important study at length because the accessibl e conclusions misrepresent the findings, and, indeed, because some of the methodological choi ces limit the generalizability of the findings. We begin by describing the conclusions and the findings. The conclusions follow, taken verbatim from the study report: 1. High schools should be smaller than many are. (p. 216) 2. High schools can be too small. (p. 217) 3. Ideal size does not vary by the types of students who attend. (p. 217) Before proceeding to a discussion of the reasons why these conclusions need to be viewed with caution, especially by those con cerned with smaller schools in rural places, we summarize the findings (as distinguished from the conclusions) more closely. The findings that follow each reflect one of the figures used by the authors to display HLM results graphically and make them more accessible to a wider audience.13 1. The effect of size was apparently curvilinear. (Figure 1) 2. The magnitude of achievement gains from 8th to 12th grade in both mathematics and reading (all else equal) proved greatest in high schools enrolling 601-900 students. (Figure 2) 3. Achievement equity was maximized in high schools enrolling fewer than 300 students (math) and 301-600 (reading). High school s larger than 1,500 substantially increased achievement inequity. (Figure 3) 12 This is a comparatively simple point, but it relates to the researchers conception of reality: it is an ontological question of some interest. Do we unde rstand context as general or particular? What sort of sense does the construct average context for an individual make? We believe that it does not make much sense because context is indeed particular. 13 These interpretations of the information in Figu res 1-6 vary slightly from those given by the authors (cf. Lee & Smith, 1997), but our interpretations are defensible and conservative readings of the findings.
School size and achievement 8 4. In comparing high-SES schools and low-SES schools, the achievement gap proved narrowest in mathematics in high schools enrolling 300-1,200 students. The gap between students in low-SES and high-SES high schools widened outside that broad band. Interaction effects with SES we re not significant for reading (Figure 4) 5. In comparing mathematics gains in high-minority (Black and Latino) and low-minority schools, gains were highest in schools enrolling 600-1,200 students. Achievement equity, however, was maximized in schools enrolling 300-600 students. Schools larger than 2,100 students showed both the smallest gains and the greatest inequity. (Figure 5) 6. In comparing reading gains in highand low-minority schools, gains proved highest in schools enrolling 600-1,200 students. Achi evement equity was maximized in schools enrolling fewer than 300 students. Gains and equity were sharply reduced in schools larger than 1,500 students. (Figure 6) The studys three conclusions communicate these six findings very simply indeed. Both the complex findings and the simple concl usions have, however, proven useful to urban educators struggling to reverse the decades of educational damage arguably imposed by very large schools. Taken together, the findings rather clearly suggest that schools larger than 1,500 or 1,800 students do frightful harm to both educational equity and to the achievement growth of all their students and that schools this large substantially compound the threatened lifechances of the impoverished youth enrolled in them. The larger the school, in fact, the worse the damage. This study demonstrates the existen ce of upper limits of high school size in view of the desiderata of academic achievement. Although this study is a very fine one, it has some limitations and shortcomings. The ones that concern us are those with policy implic ations for smaller size generally, and, more particularly, for school size in rural places. We turn next to the critique, which is centered on the three conclusions, as given above. High schools should be smaller than many are This broad statement exhibits sufficient caution and honors the complex findings. It seems evident from a conservative reading of the findings that schools enrolling more than 1,500 students, or perhaps 1,800, depress academic growth and simultaneously magnify academic inequity. The conclusion aligns nicely with the findings as restated by us. We can, however, use insight from our conservative reading of the findings to inte rrogate the conclusion further, and on objective terms. Given the harm done by mega-schools of more than 1,500 students, we can ask how many high schools enrolled more than 1,500 or 1,800 students in 1988 (the year the NELS school-completers began high school). The answer is easily supplied with information available from the Common Core of Data (CCD): 2,062 public schools with 12th grade the highest grade enrolled more than 1,500 students in 1988, all but 300 of them in cities and suburban areas. Of schools with more than 1, 800 students, 1,264 existed nationally at that time, all but 143 in cities or suburbs.14 To call such proportions many seems an appropriate 14 These 1988 data will predictably closely match th e 1992 size distributions, the year many members of the cohort completed 12th grade and qualified for inclusion in the sample studies by Lee and Smith.
Education Policy Analysis Archives Vol. 12 No. 52 9 characterization of the situation in metropolitan areas. Elsewhere, however, mega-schools are not many, and one might jump to the conclusion that without a mega-school problem, achievement-related size issues do not exis t outside of big cities and their suburbs. In fact, however, school consolidation is an enduring issue in rural areas, and so adequate representation of the variation in school size there would seem necessary to the validity of any study for which generalization to rural areas is claimed. Unfortunately, the NELS data set does not capture this variation adequately and presents a sharp challenge to school-size researchers, and this brings us to a consideration of the second conclusion. Schools can be too small. The relationship of this assertion to the findings is problematic for an important reason not discusse d by Lee and Smith (1997): The schools of neither the study subsample nor the NELS data set as a whole reflect the national distribution of school size.15 This non-representativeness is a specific threat to the findings, especially as they apply to small schools, and, therefore, as they apply to rural schools (which are smaller than non-rural schools). We start with a discussion of the distributi on of size among base year schools (when the NELS sample was in the 8th grade). The discussion is germane because any size bias in the original, base-year sample persisted into subse quent waves of data collection. Lee and Smith addressed this threat by (a) applying weights and using weighted z-scores to derive base-year school-level variables and (b) in the absence of NELS weights for high schools attended by NELS students in the 12th grade, developing their own weights. This procedure addresses the threat, but by no means resolves issues for researchers interested in rural places and in smaller school s. For this segment of the population of schools, weighting still allows 77 smaller schools (those with eighth grade enrollments less than 84, the national median) in the NELS sample (n=77 of 801 cases with non-missing size data) to represent a very large number of smaller schools in the population (n=11,345). By comparison, of course, the upper half of the nation al size distribution in the NELS base year is represented by 724 schoolsnearly ten times as many (cf. Jencks, 1985, for a similar observation related to High School and Beyond.). 16 In other words, despite weighting and 15 NELS does provide a base year weight (BYADMWT) for schools similar to that provided for students (BYQWT), but use of BYADMWT is recommended only for school-level analyses and not in any analyses, including multi-level analyses, wher e students are the unit of analysis (e.g., Spencer, Frankel, Ingels, Rasinski, & Tourangeau, 1990). Wi thout some adjustment to the second-level data, however, this methodological choice means that nonrepresentative second-level data enter the analyses, because reality is being represented throug h the lens of student data (i.e., ontological priority is assigned to students over contexts ). In any case, comparison of the unweighted distribution of size among NELS schools with th ose in the population (via the Common Core of Data) confirms the substantial size bias of the (unweighted) NELS data set. Weighting permits the estimation of national parameters, but cannot be re lied on for analyses below the national level or for analyses responsive to issues of smaller sizein particular issues of size that include the smaller half of the universe of US schools. 16 The bias at the high school level is probably qui te similar, though we did not, however, examine it. Table 1 compares the unweighted NELS distributi on of base year schools with the coeval national distribution; national data taken from the 1987-1 988 Common Core of Data national school file. Christopher Jencks (1985) critiquing estimates of sectoral effects on studen t achievement estimated
School size and achievement 10 adjustment of mean standard errors for desi gn effects, much more error is embedded in findings, and therefore, in conclusions, about smaller schools than is acknowledged. The National Center for Education Statistics has in fact recommended against using school-level weights for any but school-level analyses (Spen cer, Frankel, Ingels, Rasinski, & Tourangeau, 1990).17 In any case, generalizations about smaller schools based on the findings of this study seem poorly justified, and this difficulty mean s that neither the related findings nor this conclusion (schools can be too small) should be accepted as an adequate characterization of the influence of school size on student achievem ent in rural areas. The threat posed by the NELS size bias also has implications for claims about ideal size. Ideal size does not vary by the type of students who attend At play in this conclusion are two issues: (1) the construct of ideal size and (2) the representation of findings about interaction effects. We begin with the construct of ideal size. The determination of ideal sizenationally optimal size, as used hereembeds a judgment undisclosed in the conclusion (perhaps for the sake of brevity), but also almost entirely undefended in the narrative. The undisclosed judgment is that ideal should be determined only with reference to the findings about magnitude of achievement gain from grade 8 to 12, setting the findings about equity aside, and dismissing concern for students who drop out, or are pushed out, of high school. In fact, the equity findings are not explicitly represented in any of the three conclusions. They figure in this one implicitly, but only as a denial.18 The issue is considered this way in the study report: Obviously, the aims of effectiveness and equi ty are not completely parallel. In general terms and considering both outcomes, our results lead us to recommend an enrollment size of between 600 and 900 students as ide al [quotation marks in original] for a high school. (Lee & Smith, 1997, p. 217). This passage is the entire consideration, not an ex cerpt. The judgment of ideal is asserted as authorial privilege and is not defended or ex plained. The judgment is literally (and surprisingly) unwarranted. from High School and Beyond data noted a simila r problem. According to Jencks (1985, p. 131), The fundamental problem here is sample size (p. 131) ; .... The HSB sample may have yielded an inflated point estimate of the sector effect simply by chance (p. 134). The HS&B base year sample included 894 public schools, 84 Catholic schools, and 27 other private schools (Coleman, Hoffer, & Kilgore, 1981, Table A.1.3). 17 This recommendation, however, seems problematic, in the case of joint concern for context and for individuals within contexts and, like Lee and Smith, we have not followed itexcept in the case of our size variable (see the methods s ection of this report for relevant details). 18 The conclusion references equity by way of denial : it states that the ideal sizethe one in which achievement gain is greatestis identical from analysis to analysis, and is the same even in those analyses that examine parity of achievemen t gain; this conclusion does not, nor does any conclusion, summarize the findings about parity of achievement gain. Rather, it transmits the impression that the studys equity findings are unimportant, whereas they are patently important (they are, after all, reported ).
Education Policy Analysis Archives Vol. 12 No. 52 11 What might be the alternatives for determini ng the issue? There are several. One could defend the choice of excellence over equityor th e choice of equity over excellence; the case could be made in each instance. Anothe r alternative would avoid privileging one value over another (equity over excellence, for inst ance), but recognize a need to represent the findings that encompass both values. One might, in short, make a satisficing recommendation (see Simon, 1979, on bounded rationality). As Jo hn Gardner (1961) wrote many decades ago, equity and excellence are not only related, they are arguably mutually dependent. A satisficing recommendation in this case might have framed a conclusion to incorporate the findings about equity and excellence in specifying an appropriate size range. In particular, a size range of 300-900 stud entsor even 100 to 1,000 studentsseems a suitably conservative interpretation of the findin gs (i.e., when both equity and excellence are considered valuable). Even this specification, however, might need to be adjusted for rural areas, given the size bias evident in the NELS sample (again, a threat not eliminated, but perhaps compounded, by weighting). Such a wide range can hardly be characterized as ideal, however, simply because it is so wide. In effect, this studys chief virtue is the empirical warrant it provides for an upper limit of high school sizearguably about 1,000 students. The studies by Howley and colleagues suggest that wi thin the wide range estimated from the Lee and Smith findings (say 100-1,000), schools in impoverished or mixed-SES communities should be proportionately much smaller, with the smallest schools sustained in the most impoverished communities. Summary critique In short, the applicability of this prominent national study to particular states, to rural schools, and certainl y to the nation as a whole is problematic for several reasons, some methodological, some interpretive (the framing of conclusions), and some ontological (the nationally representative student does not exist in a nationally representative context). The study has made an important contribution to the size literature, but more in terms of methodology and actual find ings than in terms of the conclusions, which, as we have argued, misrepresent the findings, especially in the case of schools outside metropolitan areas. Furthermore, as an ideal or optimum, a rang e of 100-1,000 students, or even 300-900 students, seems problematic. A range this wide loses the specificity that seems essential to the concept of ideal or optimal With respect to the pursuit of optimal (i.e., ideal) size, we rather agree with David Monk and Emil Haller (e.g., Monk & Haller, 1993) that such notions oversimplify the variability of size effects. Indeed even if a defensible optimal size range is 300-900 students, one would like to know if any rule of thumb exists by which one might interpolate an appropriate size for a given situat ion. The interaction line of evidence seems to recommend SES as just such a metric.19 19 Application of such a metric is subject to the k nowledge that it is an estimation, subject to the revision of further study, theory, and evidence. The metric is not an ideal or an optimum, nor, we would caution the defenders of smaller schools, does it constitute best practice. It does constitute a basis of better-informed practice than conven tional wisdom, unexamined assumptions, or unfounded illusion. State-level studies, moreover can help those applying such a rule of thumb avoid basing their actions on na tional norms that cannot reflect circumstances that vary quite markedly from state to state.
School size and achievement 12 Two final observations remain. First, the absence of early school leavers from the cohort of students graduating from high school likely mitigates the size effects reported from any study that excludes them (as does Lee and Smiths study). The state-level studies cited previously found interaction effects to be less strong at the 11th or 12th grade levels as compared to the 8th, 9th, or 10th grade levels. One might hypothesize that the absence of dropouts from the schooland district-level aggr egations explains this rather consistent phenomenon, and that their absence in the subje ct study (Lee & Smith, 1997) has exhibited itself similarly, possibly contributing to th e difficulties of drawing conclusions about the influence of size in the smaller half of public schools. Second, the issue of size is arguably confounded with sector. Smith and Lee (1997) in cluded private school students in their study. Not only are private schools much smaller on averag e than public schools, but, once again, the smaller schools in the population of public schools are dramatically under-represented in NELS. The presence of smaller private schools in the data set compounds the existing threat from the public school size bias. Method In this study, we ask if the sorts of influences observable when schools and districts are the unit of analysis (where such effects are rather firmly established) remain evident in a nationally representative data set in which studen ts are the unit of analysis. Our use of the NELS data set is predicated on our interest in th e issues of size in rural places and contingent on our understanding of the peculiar distri bution of size among the NELS schools. Our perspective on size honors structure over process, as previously intimated. Much work remains to be understood about the structural ramifications of size prior to attempts to explain them: such explanations confront an unspec ified set of contingencies associated with the diverse contexts in which schools of different size exist. Thus, in this study, we are not keenly interested to explain hypothetical infl uences of size on process (e.g., achievement growth), and we therefore forego the use of gain scores as dependent variables. Our principal analyses form a series of increasingly more narrowly focused comparisons of means of groups of students de fined by school size and socioeconomic status. While we appreciate the usefulness of multi-level re gression, in the present study it constitutes an ancillary method, which we deploy to help si tuate the findings in a structural perspective on the equity effects of size. Data set The study employs the restricted-use version of the NELS data base. Statistical analyses were conducted by the first au thor, who is licensed to access the data set. As noted previously, NELS harbors some shortco mings for addressing size issues salient to the rural context,20 and our construction of size variables takes this fact into account. We selected all students who were enrolled in pub lic schools during 1988 (n=19,396), the NELS 20 We wish to clarify the point that NELS is an excelle nt data set; it is an aging data set, quite likely not designed with multi-level analysis in view. In any case, researchers are always under the injunction to exercise care in posing and answering questions with empirical data, and our critique is directed to that challenge, which is faced by all of us with varying degrees of success. The critique, then, is not in any way a critique of the data set or NCES. We are deeply appreciative of the availability of this data set; it is teaching us a lot.
Education Policy Analysis Archives Vol. 12 No. 52 13 base year, during which these students attended the 8th grade. All analyses are cross-sectional analyses of relevant cases (i.e., from the full public-school base year cohort, with the exception of a few cases eliminated for missing values on some variables). Table 1 8th Grade Enrollment in CCD and NELS Schools Data set percentile rank CCD (g0887) (n=22,811) NELS (bysc3) (n=816)a minimum 1.001.00 10 12.0062.00 20 24.00106.80 30 39.00150.00 40 58.00184.00 50 84.00219.00 60 121.00253.00 70 168.00300.40 80 221.00353.00 90 296.00434.80 maximum 1,361.001,327.00 a. 15 of the 816 cases have missing data for bysc3 Variables for comparisons of means The dependent variables in this study are the four standardized base-year achievement sc ores in NELS: math (BY2XMSTD), reading (BY2XRSTD), science (BY2XSSTD), and histor y-citizenship-geography (BY2XHSTD). We created three independent categorical va riables, two for school size and one for SES. First, since we wish to compare larger and smaller schools in the US as a whole, we created a dichotomous size variable based on the national median of 8th grade cohort enrollment for the nearly 22,811 schools with nonzero grade 8 enrollments in 1987-88 academic year (i.e., 84 students). Schools en rolling fewer than 84 students are designated smaller schools, and those enrolling 84 or more students are deemed larger.21 Second, we followed the same procedure to create a more nearly continuous size variable appropriate to our purposes. We classified schools by national deciles of 8th grade 21 Because of our appreciation of rural schools, we understand the variability in grade-span configurations exhibited across American schools, even at the high school level. In nearly all our previous studies, we use enrollment by grade level (or average enrollment by grade levelmuch the same thing) as our metric of size. This choice eliminates the possible confounding effects of grade span configuration on size. Dichotomizing the si ze variable at the national median parallels decisions in previous analyses with schools an d districts as the unit of analysis.
School size and achievement 14 enrollment. We used this variable in our analyses comparing means and in our multi-level analysis. Third, we classified the 19,062 students wi th data on both school size (BYSC3) and SES (BYSES) into SES quartiles. Quartiles were determined in analyses weighted by the baseyear weight (BYQWT). See Table 2 for the quartile cut-points. Table 2 Quartiles of students socioeconomic statusa Percentile rank minimum 2.970 25 0.769 50 0.197 75 + 0.329 maximum + 1.907 a. n=19,062 (all cases valid on bysc3 and byses); mean = -.20939 For prior achievement both in our comparison of means and in multi-level analysis, we used base year composite prior grades (BYGRADS), which are based on student self-reports. This variable shows quite strong correlations with th e dependent variables, averaging approximately r = .50. For locale, the study uses the NCES Johns on codes, which in the iteration newly available in the 1987-88 CCD records employed 7 categories.22 We created a salient locale variable, rural vs. other, by coding small-to wn (Johnson code 6) and rural (Johnson code 7) into one category, rural (1), and all else non-rural (0).23 This decision was based on the insight that most small towns exist as trading centers within rural areas. We imported locale codes from the 1987-1988 CCD file. The procedur e results in missing data for locale on about 18% of cases. Among the valid cases, 39% of students attended rural and small-town schools versus 61% attending nonrural schools. Table 3 compares locale for the valid NELS cases with added CCD locale data to the distribution in the original CCD source file for all schools with nonzero grade 8 enrollments.24 22 See Johnson (1989). The locales and their associated CCD codes follow: 1 = large city; 2 = midsize city; 3 = urban fringe of large city; 4 = urban fringe of mid-size city; 5 = large town; 6 = small town; and 7 = rural. Currently the CCD deploys an 8-category scheme. The 8th category, newly added, separates metropolitan rural locales (from lo cales 1-5). Locales 6 and 7 (currently as well as previously) are the non-metropolitan locales. Th e change acknowledges the existence of rural locales within metropolitan areas. Of the 81 6 public schools in the NELS data set, 666 were successfully matched with CCD information. 23 Small town schools are, by definiti on, located in nonmetropolitan areas. 24 Although we must be cautious about this concl usion due to the 18% missing cases resulting from the addition of CCD data, it nonetheless appears that rural schools are under-represented in the
Education Policy Analysis Archives Vol. 12 No. 52 15 Table 3 School Locale in CCD and NELS Schools Data set CCD (Locale87) (n=22,811)a NELS (schlocal) (n=816)b Locale N % N % 1 1,8258.19814.7 2 2,1969.811517.3 3 2,29710.210315.5 4 1,6947.67311.0 5 3591.6132.0 6 5,10022.715323.0 7 8,96640.011116.7 a. minus 374 missing cases b. minus 150 missing cases Details about variables used in our multi-leve l analyses are more fully described in the next section, methods of analysis, in that part of the discussion devoted to describing the theoretical multi-level model. Briefly, in a ddition to our decile measure of size and our measure of prior achievement, the multi-leve l analyses employ a dichotomous measure of ethnicity, school-level aggregati ons of specified student-level variables, and the cross-level interaction terms implicit in the theoretical model. Please see that section for details about centering and weighting. Methods of analysis Using our size and SES variables we can compare the performance of the poorest students (and the most affluent students) in smaller versus larger schools. We can also inspect the pattern of achievement differences between smaller and larger schools across the SES quartiles. All an alyses use the student-level weight variable BYQWT, with standard errors adjusted for design effects, as advised by NCES (Curtin, Ingels, Wu, & Heuer, 2000). First, we report achievement means for students grouped into SES quartiles in smaller versus larger schools (divided at the CCD nati onal median of size) for all four tests: mathematics, reading, science, and history. In addition, to gauge the influence of prior achievement on such means, we compute estimate d marginal means with a measure of prior achievement, composite base year grades, as covariate. Second, we investigate the trends observable in the display of such means via a planned comparison of means (t-tests) for students in the top and bottom SES quartiles in smaller and larger schools, for the entire sample and for students attending rural and smalltown schools only. Third, to provide a finer-grained picture of school size effects among individual students, we investigate the achievement of the lowest SES quartile of students across the 10 national size deciles. We report means in all tests across the decile groups, and follow this (unweighted) NELS data set. This conclusion is at least consistent with the evident (unweighted) size-bias previously discussed (rural schools be ing markedly smaller than other schools).
School size and achievement 16 report with a comparison of the means for students (lowest-SES-quartile students) in the smallest size decile for which statistics are reportable as compared to the largest decile. Fourth, and parallel to analyses in previous state-level reports, we examine the relationship between individual-level SES and indi vidual-level achievement in the extreme size deciles. This analysis includes all students at tending school in the relevant deciles, not only those in the lowest SES quartile. Fifth, because these analyses show quite c onsistent effects of school size with respect to bona fide national norms of size, we use multi-level modeling to situate school size effects within a regression model. The theoretical model is based on the most potent individual-level predictors of achievement (i.e., SES and prio r achievement). In OLS regression, these two independent variables account for 35% of the va riance in the dependent variable (mathematics achievement for this analysis).25 The theoretical model posits 10 independent variables (at both levels and including cross-level interaction terms, but excluding the intercept and the four error terms) as hypothetically efficient predictors of the achiev ement of students attending the 801 schools for which valid data exists across cases. The theoretical model follows: ij = 0J + 1JSES1 + 2JPRIOR1 + (u0J + u1J + u2J + eIJ) 0J = 00 + 01SES2 + 04SCHSZ+ 03PRIOR2 + 04WHITE2 + u0J 1J = 10 + 11SCHSZ + 12WHITE2 + 13SES2 + u1J 2J = 20 + 21SCHSZ + 22SES2 + u2J In particular, the model theorizes that school-level SES (SES2), school size (SCHSZ), schoollevel composite prior achievement (PRIOR2) and school-level proportion of nonhispanic white students (WHITE2) will influence the sc hool-level mean of the dependent variable (mathematics achievement), which is given by the expression for the random intercept, 0J. The model further suggests that the school-level gradient of individual-level SES ( 1J) is mediated by school size, school-level proportion of white students, and sc hool-level SES. It suggests that the school-level gradient of individual-level prior achievement ( 2J) is mediated by school size and school-level SES. The expanded theoretical model, with a maximum of 15 parameters available for estimation is given by the following equation: ij = 00 + 01SES2 + 04SCHSZ+ 03PRIOR2 + 04WHITE2 + 10SES1 + 11SES1*SCHSZ + 12WHITE2*SES1 + 13SES2*SES1 + 20PRIOR1 + 21PRIOR1*SCHSZ + 22SES2*PRIOR1 + u0J + u1J*SES1 + u2J*PRIOR1 + eIJ 25 Including other student-level predictors (i.e ., ethnicity, gender, homework effort) increases explained variance only a little (raising r2 proportion to 39%).
Education Policy Analysis Archives Vol. 12 No. 52 17 School-level variables are weighted z-scores, with the exception of the size variable, which is already based on the national distribution of 8th grade cohort enrollment. We adopt this method of centering and school-level weighti ng following the example of Lee and Smith. Our individual-level variables are also calcul ated as z-scores and centered on the weighted school values. Our multi-level analysis was conducted with the SPSS mixed-models module following the method outlined by Bickel (forthcoming). Design effects were estimated using a shareware software package (American Institutes for Resear ch, 2003). Theoretical models must be fitted to the data (Kreft & de Leeuw, 1998), and expe rience suggests that some of the theoretically salient predictors will not appear in the fitted model. We began the process of fitting the model by computing the null model (predicting only the interceptthe grand mean, and without random coefficients). Next we enter ed the two student-level predictor variables (SES1 and PRIOR1), but with fixed slopes. We then introduced all four school-level predictors of the random intercept. Next, in sequence, we added school-level predictors of student-level SES, adding one school-level predi ctor variable at a time; and then followed suit with by fitting the two predictors of prior achiev ement. At each step we assessed model fit by inspecting the minus-2 log likelihood, allowing fo r the Kreft and de Leeuw rule of thumb (a reduction in minus-2 log likelihood of at least twice the number of parameters estimated by the equation, see Kreft & de Leeuw, 1998, p. 65 ). The process of fitti ng stopped when model fit was maximized and all available independ ent variables (both levels and cross-level interactions) had been examined. Results Our first analysis examined means from two analyses of variance: one two-way ANOVA of achievement scores in all four subjects tested (smaller or larger school size by SES quartile), and the same analysis, but with composit e prior grades the covariate. Table 4 reports the mean achievement (with and without the covariate; estimated marginal means in parentheses). We are interested here only to observe the pattern of estimated marginal means; we do not yet report significance tests for particular comparisons at this step, either for unadjusted or adjusted means. The interacti on of size and SES, however, exhibits adequate statistical significance to warrant planned tests of mean differences (varying from p<.001 for mathematics to p <.05 for science and history). Again, all analyses in this study were weighted by the base year weight variable (BYQWT). What evident patterns do we observe in Table 4? First, the predictable differences in achievement by SES quartile are evident. Each cell in the table gives the achievement mean in a subject for a given SES quartile in smaller school s, larger schools, and as the total for the quartile. In each subject, quartile total scores increase to a similar degree, with the observed difference between lowest and highest SES quartile equivalent to about .65 standard deviationsa substantial effect size.
School size and achievement 18 Table 4 Achievement means for quartiles of socioeco nomic status, smaller versus larger schools mathematics reading science history SES Quartilea Sizeb,c meand SD meand SD meand SD meand SD smaller n=902 45.73 (47.29) 8.0446.08 (47.51) 8.6646.24 (47.52) 8.83 45.83 (47.16) 9.12 larger n=3786 44.17 (45.81) 7.2144.40 (45.90) 7.8944.67 (46.02) 7.86 44.32 (45.72) 8.37 1 total n=4688 44.49 (46.56) 7.4244.74 (46.70) 8.0844.99 (46.77) 8.10 44.63 (46.44) 8.55 smaller n=826 49.06 (49.38) 8.6849.11 (49.40) 9.1849.80 (50.06) 9.55 49.29 (49.56) 9.13 larger n=3627 47.66 (48.38) 8.8248.11 (48.77) 9.2048.01 (48.60) 9.10 47.83 (48.45) 8.98 2 total n=4453 47.94 (48.88) 8.8148.31 (49.09) 9.2148.37 (49.33) 9.22 48.13 (49.01) 9.03 smaller n=568 51.56 (50.59) 9.2551.36 (50.49) 9.3852.12 (51.38) 9.56 51.53 (50.71) 9.16 larger n=3826 50.31 (50.15) 9.5050.29 (50.14) 9.5750.52 (50.39) 9.60 50.44 (50.30) 9.26 3 total n=4394 50.49 (50.37) 9.4850.45 (50.31) 9.5550.75 (50.86) 9.61 50.60 (50.50) 9.26 smaller n=395 54.72 (52.65) 9.8054.35 (52.45) 10.2754.88 (53.18) 9.99 54.64 (52.89) 10.12 larger n=3994 55.90 (53.98) 10.3154.81 (53.05) 9.8855.02 (53.45) 10.06 54.92 (53.28) 9.85 4 total n=4389 55.78 (53.31) 10.2754.76 (52.75) 9.9255.01 (53.31) 10.06 54.89 (53.08) 9.88 smaller n=2691 49.47 (49.98) 9.3449.50 (49.96) 9.6850.01 (50.52) 9.89 49.56 (50.08) 9.78 larger n=15233 49.76 (49.58) 10.0749.62 (49.46) 9.9549.77 (49.61) 9.99 49.60 (49.47) 9.96 all total n=17924 49.71 (49.78) 9.9649.60 (49.71) 9.9149.81 (50.07) 9.97 49.59 (49.76) 9.93 Notes a. BYQWT-weighted quartile of BYSES for 19,062 cases valid on byses (SES) and bysc3 (8th grade enrollment) b. BYSC3 divided at the national median of 8th grade enrollment for 22,811 schools in the Common Core of Data with nonzero grade 8 enrollment in 1987-1988 c. unweighted N across all achievement measures d. estimated marginal means in parentheses (cova riate: composite prior grades [BYGRADS]; analyses weighted by base year weight [BYQWT])
Education Policy Analysis Archives Vol. 12 No. 52 19 Second, in Table 4, we see that there seem to be observable patterns related to differences in size, as portrayed by our categorie s of smaller and larger. In every subject, with and without control of prior achievement, th e observed means for the lowest SES quartile are higher in smaller than in larger schools. This pattern of difference, however, holds true also for the second and third SES quartiles: observed means for smaller schools are higher than for larger schools. Only in the fourth SES quartile does this pattern seem to reverse. The differences in magnitude in the observed mean s in the fourth quartile, however, are very modest, not even one-tenth the magnitude observed in the first quartilelargest in mathematics at .12 and much smaller in the others (.05 in reading, .03 in science, and smallest in history at .02). Even in a large data set, di fferences this small can be of doubtful statistical significance. In any case, Table 4 suggests the ex istence of an interaction effect of size at the level of individual students, and, as noted a bove, the overall tests of significance support the inference. We conducted planned tests of signific ance on some of the observed differences reported in Table 4. We compared the performance of students in the lowest SES quartile enrolled in smaller schools to the performance of other students in the same SES quartile enrolled in larger schools; and we also compar ed the performance of highest-SES students enrolled in smaller versus larger schools. Results are presented in Table 5. Again, analyses were weighted with the base-year weight variable and standard errors were adjusted for design effects. As anticipated, in all four subjects the difference in test scores between t hose lowest-SES-quartile students enrolled in smaller schools and those enrolled in larger sc hools exhibits strong statistical significance (p < .01 in all cases). Using within-quartile pooled variance to estimate effect size, we assess the practical significance of these differences. E ffect sizes are about +.20 in favor of smaller schools for these students. The situation is different for students in the highest SES quartile, however. As we noted previously, means for larger schools exceed those for smaller schools among students in the highest SES quartile. Table 5 reports the statistical non-significance of all these observed differences in the fourth SES quartile.26 Because we are particularly concerned with the implications of school size in rural places, we repeated the previous analysis for students attending rural and small town schools only. Again, we compared lowest and highest SES students attending larger versus smaller schools (split, again, at the national median of 8th grade enrollment), and the results are reported in Table 6. The pattern of differences within SES quartiles for smaller as compared to larger schools is similar to that reported in Table 5, but the effect sizes are consistently about 50% larger for lowest SES rural and smalltown students attending smaller schools than are those calculated for the sample as a whole (i.e., es +.30 vs. +.20). The differences favoring larger schools in the highest SES quart ile, however, are nonsignificant, as in Table 5. Given the foregoing results, the study was poised to examine the continuity or discontinuity in the evident influence. The poor representation of smaller schools in this data set, however, has rendered such an inquiry somewhat difficult. We addressed this difficulty, as noted previously, through use of a measur e of size based on national deciles of 8th grade 26 We report an effect size only for mathematics achiev ement, despite the lack of significance. Just 395 highest-SES public-sector NELS students are en rolled in smaller schools, and the difference in means reported in Table 5 approaches statistical signif icance. It is possible, though perhaps unlikely, that statistical significance would be reached with a larger sample size.
School size and achievement 20 enrollment. This measure avoids the problem of multiplying error through weighting, but caution is still needed, especially in inspecting the sample sizes of cells within the analyses. Data from cells with fewer than 30 cases should not be reported according to NC ES (Curtin, Ingels, Wu, & Heuer, 2002). Although an unknown degree of error lurks in th e alternative measure of size, the alternative seems appropriate, given the available options. Table 5 t-tests of mean achievement differencesa, students in smaller as compared to larger schools (schools in all locales) Panel 1: lowest SES quartile of studentsb mean in smaller mean in larger difference SEdiff c t-value P effect sized mathematics 45.730 44.168 1.562.467903.3828.00089 + .21 reading 46.082 44.398 1.684.426133.9526.00009 + .21 science 46.239 44.667 1.572.534352.9418.00338 + .19 history 45.833 44.320 1.512.550832.7464.00619 + .18 Panel 2: highest SES quartile of students mean in smaller mean in larger difference SEdiff c t-valuep e effect sized,f mathematics 54.717 55.901 -1.184.758471.5608.12 (ns) (-.12) ns reading 54.346 54.808 -0.461.662950.6967.49 (ns) ---science 54.881 55.025 -0.144.663420.2172.83 (ns) ---history 54.642 54.923 -0.281.728660.3857.70 (ns) ---Notes. a. means unadjusted for covariate (BYGRADS); sa mple sizes are those reported in Table 4 b. sample selected for valid cases on BYGRADS, to yield the same unadjusted parameter estimates as reported in Table 4 c. standard errors adjusted for desi gn effects with with AM Version 0.06.01 Beta (released October 27, 2003); software available gratis from the fo llowing URL: http: //am.air.org/about2.asp d. based on within-quartil e pooled variance; see Table 4 for the related standard deviations e. see Table 4 for cell sizes; relatively few NELS students from the highest SES quartile (n = 395) attended smaller schools (see note); with a larg er sample size attendin g smaller schools, the mathematics difference might have proven statistically significant (the other observed nonsignificant differences are quite small and would not likely be rendered significant with larger sample size) f. the effect size associated with the observed non-significant values (see item e ) is reported parenthetically for mathematics because marginal signif icance may be an artifact of small sample size
Education Policy Analysis Archives Vol. 12 No. 52 21 Table 6 t-tests of mean achievement diffe rences, students in smaller as compared to larger schools (rur al and small-town schools only) Panel 1: lowest SES quartile of studentsa mean in smaller mean in larger SD (pooled) diff. SEdiff b t-value p effect sizec mathematics 46.438 44.2537.4432.1840.627713.4793 .00060 + .29 reading 46.833 44.6398.2782.1940.574913.8163 .00017 + .27 science 47.600 45.0588.3052.5420.629833.6404 .00033 + .31 history 47.069 44.3728.6332.6970.690113.9084 .00012 + .31 Panel 2: highest SES quartile of studentsc,d mean in smaller mean in larger difference SEdiff b t-value p effect size mathematics 55.083 55.942-0.8 591.01890.8432.40 (ns) ---reading 55.229 55.246-.0.01 70.89080.0196.98 (ns) ---science 55.801 55.895-0.0940.75380.1247.90 (ns) ---history 55.030 55.332-0.3020.89550.3376.74 (ns) ---Notes. a. unweighted n: 462 (students attending smaller scho ols); 1,247 (students atte nding larger schools) b. standard errors adjusted for design effects with AM Version 0.06.01 Beta c. unweighted n: 213 (in smaller schools), 1,037 (in larger schools) d. based on within-quartile pooled variance (SD pooled); pooled-variance standard deviations not reported in panel because calculation of effect si zes is not warranted based on nonsignificance of difference scores. Our particular interest for this analysis is the achievement of students in the lowest SES quartile. We computed achievement means for the four tests for these students in each size decile. Table 7 reports the results. In addition to the means for the four achievement measures, Table 7 reports the 8th grade enrollment band defining each decile, and the number of cases in each cell. The Table notes prov ide further information on the number of schools and of states represented in each size decile. Curtin and colleagues suppression rule (Curtin et al., 2000) applies only to the means for the firs t decile. Deciles 2 through 10, however, exhibit adequate cell sizes and we report the achievement means for those cells. The data in Table 7 are suggestive of a linear relationship across the deciles in all subjects (see multi-level results for unique estimates of the influence of school size and the interaction of size and SES based on this size variable). The lowest reportable decile exhibits the highest means, and the tenth decile exhibits the lo west means, across all achievement measures. Scores, moreover, tend to decline from one cell to the next as one ascends from lower to higher deciles. One might, indeed, characteriz e the center (deciles 4 through 8) as lumpy, and, of course, the difference between adjacent cells is not likely to reach statistical significance in many cases. Sampling artifacts related to the NELS size bias may be responsible for the lumpiness, or size effects in the population might be nonlinear, or some other condition might be responsible. One cannot judge definitively, but Table 7 would seem in any case to put the
School size and achievement 22 lower threshold of size for such students quite low indeed. The threshold might even be lower than the 12-23 enrollment band (8th grade cohort enrollment) that defines the second decile. This judgment, too, cannot be given because th e NELS data do not permit an adequate test. (The note to Table 7 gives reader s a sense of the various states represented by students in the analysis. The varied sample sizes and other sa mpling issues, we believe, make formal tests of significance and derivation of effect sizes so mewhat problematic here. Nonetheless, conservative estimates of effect sizes for obser ved differences can be derived by using the NELS tests theoretical standard deviation of 10 as the denominator for observed differences.) Table 7 Mean achievement for students in lowest SES quartile by national deciles of school size Size decilea 8th grade enrollment listwise n (unweighted) Math ReadingScience History 1 <12 10b ----------------2 12-23 63c 47.87147.31548.998 47.402 3 24-38 206d 46.07846.03246.591 45.797 4 39-57 297e 44.87045.71745.807 46.122 5 58-83 320f 45.68246.04945.581 44.956 6 84-120 421 45.12445.88245.739 45.822 7 121-167 613 43.47444.26944.003 43.901 8 168-220 719 44.34144.32045.226 44.596 9 221-295 714 44.26143.96144.473 44.057 10 296+ 1416g 43.73143.94944.064 43.719 Notes. a. based on 1987-1988 CCD national decile s for 22,811 schools with nonzero 8th grade enrollment; analyses weighted by BYQWT b. unweighted n < 30 in all cells; values not reported, per instructions of NELS base year student manual; the 10 students in this cell attended 3 schools, each in a different state c. these 63 students attended 14 schools in 12 states (i.e., AK, AR, IA, ID, IL, KS, MN, MO, ND, NE, OK, TN) d. these 206 attended 21 schools in 17 states (i.e., AL, AR, AZ, CA, IL, KS, LA, MI, MO, MS, NJ, ND, NM, NY, OK, TN, WI) e. these 297 students attended 31 schools in 21 states (i.e., AL, AR, CA, IA, IL, IN, KY, LA, ME, MI, MO, ND, NH, NJ, NY, OH, OR, TN, TX, WA, WI) f. these 320 students attended 44 schools in 25 states (i.e., AL, AZ, CA, CO, FL, IA, IL, KY, LA, MA, ME, MI, MN, MO, NC, NJ, NY, OH, OK, OR, PA, SC, TN, TX, WI) g. these 1416 students attended 228 schools in 36 states (i.e., AL, AR, AZ, CA, CT, FL, GA, HI, IA, ID, IL, IN, KS, KY, LA, MA, MD, MI, MO, MT, NC, NE, NJ, NM, NV, NY, OH, OK, PA, SC, TN, TX, UT, VA, WA, WI) The significance and effect sizes of the difference in mean achievement are reported, however, in Table 8, for the second and tenth deciles. Again, this comparison is made for students in the lowest quartile of SES. Despite the comparatively small number of students representing the second decile, the t-values have remained large and the effect sizes are substantial, averaging about .50 standard deviations. We also drew a small random sample of students from the 10th decile (n=91) to perform the same analysis as reported in Table 8, but
Education Policy Analysis Archives Vol. 12 No. 52 23 with balanced cells. These unreported results proved nearly identical to those reported in Table 8 and are available from the authors. A ll differences were statistically significant (p < .03). Table 8 Achievement differences among students in lowest quartile of SES, in seconda versus tenth deciles of 8th grade enrollment Notes. a. too few cases in lowest size decile (n<30 all cells) to produce reliable estimate s; next lowest quartile used instead b. national deciles of size based on 22,811 schools with nonzero enrollment in grade 8, 1987-1988 c. standard errors adjusted for design effects with AM Version 0.06.01 Beta d. standard deviation based on pooled variance of full SES quartile (i.e., across all deciles of size) Previous investigations of the interaction e ffects of size have hypothesized that the higher test scores in smaller schools serving impoverished communities may be partly the result of a weakening of the usually strong bond that exists between socioeconomic status and achievement. In those studies with schools and districts, the overall relationship between SES and achievement (i.e., across all SES groups) were reported to be consistently weaker among smaller schools and districts. Those findings were, moreover, very consistent from study to study. Table 9 reports a similar analysis on all the students attending schools in the second, third, and tenth deciles of national size (i.e., from all SES quartiles). The Table provides three contrast groups: the second, the tenth, and the combined second and third deciles. As in previous studies, Table 9 reports th e proportion of variance shared by SES and the various achievement measures. Before computing the shared variance (the squared correlation coefficient), we examined the SES distributions in each decile. The second decile exhibited a narrower range than the tenth; the ra nge among students classified in that decile was modestly restricted at both ends. We theref ore constrained the range for all analyses to that exhibited by the second decile.27 27 That is, we imposed the SES maxima and minima evident among the group of smaller schools to the group of larger schools, eliminating some ca ses. We ran analyses with and without the restriction; the reduction in r2 among students in the tenth decile was very modest (cf., for math reading science history size decileb 2 (12-23) 10 (296+) 2 (12-23) 10 (296+) 2 (12-23) 10 (296+) 2 (12-23) 10 (296+) means 47.871 43.731 47.31543.96348.99844.096 47.40243.711 Nunw 63 1440 631432631438 631427 SEmean c 1.150 0.258 0.7870.3331.0520.301 0.7240.357 SD 9.119 7.276 9.1908.0739.9997.850 10.0728.598 SDpooled d 7.400 8.050 8.072 8.548 diff 4.110 3.352 4.901 3.691 SEdiff 1.178 0.854 1.094 0.807 t-value 3.489 3.923 4.480 4.573 p .00058 .00012 .00001 .00001 effect size + .56 + .42 + .61 + .43
School size and achievement 24 Table 9 Percentage of variance shared by achievement and SESa for selected deciles of 8th grade enrollment Notes. a. SES range for all deciles constrainted to th at of the second decile (-1.851
Education Policy Analysis Archives Vol. 12 No. 52 25 Table 10 Fitted multi-level equity modela Dependent variable: BY2XMSTD; intra-class correlation = .237 R1 2 = 44.2%d Notes. a. weighed analysis (BYQWT) with all variables center ed (individual variables on school means; school variables as weighted school-level z-scores [cf. Lee & Smith, 1997], except for SCHSIZE); standard errors of the estimates computed with AM Version 0.06.01 Beta; t and p calculated by authors from corrected standard errors b. estimates show model improvement from null model (0) to fitted model (3); model 1 without random intercept or random slopes; model 2 with random intercept added; model 3 with random slopes; significance data pertain to model 3 c. SCHSIZE gives deciles 2-10 of national school si ze, centered on decile 6 (decile 1 excluded, see discussion in text) and reflects the same measure of size used for the analyses reported in Table 8 and Table 9 d. computed from covariance estimates by authors (cf. Snijders & Bosker, 1999) Similarly, SES1 and SES2 together exert the second strongest influence on mathematics achievement, except that for SES as compared to PRIOR, the unique magnitude of contextual influence (SES2) is substantially stronger than the individual-level attribute (SES1). Socioeconomic status, unlike prior achievement, operates most strongly as a contextual variable. Together, the two SES meas ures produce an adjustment to the mean of about 5 standard-score units (i.e., equivalent to half a standard deviation if each independent variable were increased by one standard deviation). Net of these extremely strong influences (j ointly of individuals and contexts), the magnitude of other influences is predictably we aker. In the fitted model, and as theorized, school size directly influences school-lev el achievement (via its influence on 0J) but also indirectly mitigates the influence of student socioeconomic status (via its influence on 1J) on student-level achievement. The interaction takes on positive values (recall that all variables except the dependent variable are centered) for students with SES that is below average in their smaller schools and for students with SES that is above average in their larger schools. estimatesb SE df t p model 0 model 1 model 2 model 3 Intercept 49.334 49.721 50.18650.186.097771.176 517.381.000SES1 1.716 1.7191.433.094775.853 15.245.000PRIOR1 4.518 4.4934.362.069775.132 67.130.000SES2 3.6993.699.059773.966 62.695.000WHITE2 0.5190.519.061772.296 8.492.000PRIOR2 4.0464.046.043774.853 94.070.000SCHSIZEc -0.1990.199.021771.460 9.476.000SIZE X SES1 0.146.030775.904 4.867.000SES2 X PRIOR1 0.944.055776.756 17.164.000 -2 log likelihood 135792.7 126412.1124417.6124261.5
School size and achievement 26 School size does not remain in the model as an influence of the school-level gradient for student-level prior achievement ( 2J), but school-level socioeconomic status (SES2) does. All else equal (a particularly potent idea in multi-level analysis), students with prior achievement that is lower than av erage in their schools will perform better in schools with below-average aggregate SES. This interaction, in other words, tends to weaken the schoollevel gradient of student-level prior achievement. Discussion Overall, these findings, based on national student-level data, appear consistent with those previously reported in state studies with schools and districts as the units of analysis: (1) smaller school size confers an achievement adva ntage on all but the highest-SES students, (2) smaller size mediates the powerful associat ion between SES and achievement, (3) the relationship between school size and achievement is predominantly linear, and (4) size effects are at least as robust in rural school s as compared with schools overall. Three findings also modify and extend previo usly reported findings. First, contrary to the assertion of Lee and Smith (1997), these resul ts do not disclose any lower limits for school size. Second, contrary to our own previous work this study suggests that larger size does not significantly improve performance among affluent students. Third, the multi-level results show that even in complex relationship with the most potent influences on student achievement, both school size and the interacti on of school size and student SES retain a significant influence student achievement. Warranted policy options Efforts to build and sustain smaller schools are warranted on the basis of these findings. Urban areas, in particular, need new and autonomous smaller schools (rather than non-autonomous schools-wit hin-schools). This observation applies in some rural areas, as well. More particularly however, these findings provide further warrant for sustaining the existing small schools so common in rural America. In contemplating school size, citizens and educators should attend carefully to gradelevel cohort size as well as to overall school size.29 A ninth grade academy with 300 students will likely embed the sorts of structural disadv antages associated with 9-12 schools enrolling 1,200 students.30 A ninth-grade academy with 300 students, is not, in other words, a smaller school. Unwarranted policy options Educators and policy makers sometimes make unwise inferences from research findings. We want to warn them against one such inference in the case of this study. We strongly caution read ers not to infer from our findings support for any plan that would allocate smaller schools only to lo wer-SES students. In fact, the results of the multi-level analyses suggest that a subtle and di fficult-to-achieve SES balance is productive of improved equity and excellence, not segregat ion. Intentional isolation of impoverished 29 Findings from this study and from the state-by-s tate studies of the interaction hypothesis construe size in this way. 30 Research on school-to-school transitions (e.g. Alspaugh, 1998) provides some evidence, morevoer, that narrow gradespan configurations in crease the number of school-to-school transitions and thereby affect school performance adversely.
Education Policy Analysis Archives Vol. 12 No. 52 27 students already living in mixed-SES communi ties into segregated smaller schools would constitute a particularly insidious form of trac king. Indeed, in some communities such classbased segregation would inevitably segregate studen ts by race. Such de facto policies (whether raceor class-based) already work strongly to subvert the U.S. democracy. They should not be re-made de jure The inference against which we caution would show a dramatican unethical lack of circumspection. Findings from this study obviously offer no support for arrangements that work to increase the size of already small schools, especially those that serve impoverished communities (the common proposal in rural areas). Certainly, rural areas confront the challenges of out-migration, deterioration of school facilities, temporary stress on state revenues, and population increases in rural suburbs and small towns. In light of the findings from this and other studies, concern for achievement and for reducing achievement gaps means that educators and policy makers must search for ways to meet these challenges without closing schools that are already appropriately small. How should policy makers balance competing considerations? We advise it be done in ways that enable impoverished rural communities no only to retain but to improve existing smaller schools. How? Policy makers can change the rules under which state system s operate, from big-school to small-school norms. They might, in other words, un-rig the game that requires schools to be large. This study and others show that large size is not the criterion of excellence it was once thought to be. And smaller schools have now been shown to exert an evidently r obust effect on equity. It is interesting to observe that at the time large-school norms were inst antiatedthe early and mid-twentieth centuryfew educators or legislator s worried about equity. Such norms seem to have outlived their utility. Recommendations for Further Study Many participants in the small schools mo vement, as previously suggested, confound smaller size not only with the opportunity for cer tain reforms, but also with the reforms themselves. Although we understand this move we regard it as a misstep. Addressing the connection between smaller size and reform e fforts requires quasi-experimental studies comparing schools similar in size and contextual location and different only with regard to the curricular and instructional strategies they deploy. No work of this type has to our knowledge been reported. Such studies would prove an extr emely valuable contribution to the literatures on policy and curriculum and instruction, but they simply must take substantive rural and nonrural contextual differences into account. Otherwise they are likely to obscure relevant issues instead of clarifying them. This is a sharp challenge for most educational researchers, who harbor little experience of, interest in, or concern for rural communities.31 Studies that examine the nature of relati onships and communication in smaller schools are also needed (see Lee & Loeb, 2003, for a rele vant study conducted in the context of urban reform). Arguably, participation in a sm aller enterprise enables a more sure-footed construction of self in the company of trusted others as well as a greater investment by all 31 The general tendency among educational researcher s is to excuse their own lack of concern by invoking (most commonly only to themselves) the fa miliar stereotypes that render rural places as simultaneously inadequate, idyllic, and idiotic (K arl Marx famously dismissed the idiocy of rural life.)
School size and achievement 28 participants in the construction of common purpose (see e.g., Meier, 2003). Such benefits might persist regardless of the particular instru ctional and curricular arrangements preferred by participants, and research effo rts must provide for that hypothesis to ensure their objectivity. In the absence of studies unpacking the dynamics of school size, however, viewing smaller size as a proxy measure for transportable practices or processes seems misdirected at best. At worst it deflects effort away from rela tively simple policy initiatives, such as resisting the temptation to close smaller schools where they already exist and establishing autonomous smaller schools where they do not exist, toward far more ambitious and difficult ones, such as changing the practices of school teachers and administrators across the nation. One might, from a systems perspective, say that by comparison to the influence of smaller size, such reform efforts are distinctly unpromising. Change of this sort has, at any rate, so far proven remarkably costly and ineffective, at least in the estimation of such astute critics as Richard Gibboney (1994) and David Tyack and Larry Cuban (1995). We ourselves favor certain of these reforms, but it seems that the purposes of and expectations for such efforts ought to be substantively reconceived. Finally, one finding from our multi-level analyses raises a momentous issue worthy of much more study in our view. That finding suggests that students achieving below the mean in their schools perform better if the schools they attend are below the SES mean for all schools. This intriguing finding relates to our assertion that a subtle social-class balance may help maximize achievement level and equity. Engineering this balance in any comprehensive way seems quite improbable. This finding, instead of prompting precipitous actions, suggests to us the need to examine more closely the ways in which class prejudice operates, especially in schools serving mixed-SES and affluent communities. It also suggests the need for much more extensive analyses of the relationship between inequality in civil society (especially as related to residence) and class-related achievement inequality in schools. Such work is particularly needed if the nation is ever to take seriously the challenge of closing the achievement gap (sometimes known as leaving no child behind). The proposition that closing the achievement gap is the lever by which society will become more equitable (the seeming logic behind much current legislation) strikes us unsupportable and ultimately deceptive. The absence of such research, moreover, is arguably a sign of its critical importance in an age of increasing income and wealth inequality. Ten Practical Recommendations We conclude this report with recommendations intended to be as unambiguous as the conclusions developed by Lee and Smith. The difference between those conclusions and these recommendations is that the recommendations are framed to remain debatable by a lay audience precisely because they are recommendations We explicitly disavow the privileged status that conclusions of research so often enjoy, whereby conclusions of research appear to lay audiences as unassailable. Our recommendations are partially warranted by the findings from this and related studies, but they are also info rmed by our own experience, by the experience of some of our colleagues and students, and by our reading and other writing. We present these recommendations as our considered judgments : 1. Sustain the smallest schools in the poorest communities. 2. In communities that serve all social classes, do not build large schools.
Education Policy Analysis Archives Vol. 12 No. 52 29 3. In affluent communities (or attendance zones), do not build high schools larger than 1,000 students. 4. Keep elementary and middle schools proportionately smaller than high schools. 5. When building new, keep schools everywher e smaller than recommended in the 20th century. 6. Provide appropriate and adequate support to smaller schools: small size improves the odds of success, it does not guarantee it. 7. Attend to rural and urban issues of size with equal care. 8. Regard smaller school size and reform as distinct issues, but do not hesitate to innovate in smaller schools. 9. Base smaller schools in extant communities so as to avoid the intentional concentration of impoverished students from mixed-SES communities into smaller schools (e.g., as in contemporary alternative schools, so-called). 10. Doubt that an educationally-relevant lower limit of school size exists. Much depends on context, and even in the contemporary world, dedicated parents educate very small groups of childre n with remarkable success at home. Note : This research was partially supported by grants from the National Science Foundation (Grant No. 0119679) and the Rural School and Community Trust. Any opinions, findings, and conclusions or recommendations expressed in this report are exclusively those of the authors and as such do not necessarily reflect th e views of the National Science Foundation or the Rural School and Community Trust. This pape r was presented at the annual meeting of the American Educational Research Asso ciation, San Diego, CA, April 2004. References Abbott, M., Joireman, J., & Stroh, J. (2002). The influence of district size, school size, and socioeconomic status on student achievement in Wa shington: A replication study using hierarchical linear modeling (Technical Report No. 3). Lynnwood, WA: Washington School Research Center. (Retrieved January 14, 2004 from http://www.spu.edu/orgs/research/districtschoolsizetechreport3.html) Adams, H. (1907/1943). The education of Henry Adams New York: Modern Library. Alspaugh, J. (1998, February/March). The re lationship of School-to-school transitions and school size to high school dropout rates. The High School Journal 154-160. Alspaugh, J., & Gao, R. (2003). School size as a factor in elementary school achievement Unpublished manuscript, University of Missouri, Columbia. American Institutes for Research. (2003). AM statistical software (Version 0.06.01 Beta, released October 27, 2003). Washington, DC: Au thor. Software available online from: http://am.air.org/about2.asp
School size and achievement 30 American Institutes for Research and SRI, Inc. (2003). High time for high school reform: Early findings from the evaluation of the national school district and network grants program Washington, DC, and Menlo Park, CA: Authors. (Retrieved January 15, 2004 from http://www.gatesfoundation.org/nr/downloads/ed/smallschools/ Small_schools_eval_ExecSumm_2003.pdf) Bickel, R. (manuscript submitted for publication). Multi-level analysis for policy analysts: Its just regression! Huntington, WV: Marshall University. Bickel, R. (1999b). School size, socioeconomic status, and achiev ement: A Georgia replication of inequity in education Randolph, VT: Rural Challenge Policy Program. (ERIC Document Reproduction Service No. ED 433 985) Bickel, R. (1999b). School size, socioeconomic status, and achievem ent: A Texas replication of inequity in education Randolph, VT: Rural Challenge Policy Program. (ERIC Document Reproduction Service No. ED 433 986) Bickel, R., & Howley, C. (2000). The influe nce of scale on student performance: A multilevel extension of the Matthew principle. Education Policy Analysis Archives (Online), 8 (22). Retrieved February 11, 2002 from : http://epaa.asu.edu/epaa/v3n18.html. Bickel, R., Howley, C., Williams, T. and Glascock, C. (2001, October 8). High school size, achievement equity, and cost: Robust interaction effects and tentative results. Education Policy Analysis Archives, 9 (40). Retrieved October 8, 2001 from http://epaa.asu.edu/epaa/v9n40.html. Boyer, E. (1983). High school: A report on secondary education in America Philadelphia: Harper & Row. Coleman, J., Hoffer, T., & Kilgore, S. (1981) Public and private schools (Contractor Draft Report). Washington, DC: National Center for Education Statistics. Retrieved April 10, 2004 from http://www.nces.ed.gov/pubsearch/pubsinfo.asp?pubid=82230D Cotton, K. (1996). School size, school climate, and student performance (Close-Up No. 20). Portland, OR: Northwest Regional Educational Laboratory. (ERIC Document Reproduction Service No. ED397476) Cubberley, E. (1922). Rural life and education: A study of the rur al-school problem as a phase of the rurallife problem (Revised Edition). NY: Houghton-Miff lin. (Original work published 1915; ERIC Document Reproduction Service No. ED392559) Curtin, T., Ingels, S., Wu, S., & Heuer, R. (2002). National Educational Longitudinal Study of 1988: Base year to fourth fo llow-up data users manual Washington, DC: U.S. Department of Education, National Center for Education Statistics.
Education Policy Analysis Archives Vol. 12 No. 52 31 Darling-Hammond, L., Ancess, J., & Ort, S. ( 2002). Reinventing high school: Outcomes of the Coalition Campus Schools Project. American Educational Research Journal 39 (3), 639673. Friedkin, N., & Necochea, J. (1988). School system size and performance: A contingency perspective. Educational Evaluation and Policy Analysis, 10 (3), 237-249. Gibboney, R. (1994). The stone trumpet: A story of practical school reform, 1960-1990 Albany, NY: State University of New York Press. Goodlad, J. (1984). A place called school: Prospects for the future New York: McGraw-Hill. Hennen, J. (1998). The Americanization of West Virginia : Creating a modern industrial state, 1916-1925. Lexington, KY: University of Kentucky Press. Howley, C. (1995). The Matthew principl e: A West Virginia replication? Education Policy Analysis Archives 3 (18). Retrieved February 13, 2002, from http://seamonkey.ed.asu.edu/epaa/v3n18.html. Howley, C. (1996a). Compounding disadvanta ge: The effects of school and district size on student achievement in West Virginia. Journal of Research in Rural Education, 12 (1), 2532. Howley, C. (1996b). Sizing up schooling: A West Virginia analysis and critique Dissertation Abstracts International(A), 57(3), 940. (University Microfilms No. AAT 9622575) Howley, C. (1999a). The Matthew Project: State report for Montana Randolph, VT: Rural Challenge Policy Program. (ERIC Document Reproduction Service No. ED 433 173) Howley, C. (1999b). The Matthew Project: State report for Ohio Randolph, VT: Rural Challenge Policy Program. (ERIC Document Re production Service No. ED 433 175) Howley, C., & Bickel, R. (1999). The Mathew Project: National report Randolph, VT: The Rural School and Community Trust. (ERIC Document Reproduction Service No. ED 433 174) Howley, C. (2001). Research on smaller schools: What education leaders need to know to make better decisions Arlington, VA: Educational Research Service. Howley, C. (2002). Small schools. In A. Molnar (Ed.), School reform proposals: The research evidence (pp. 49-77). Greenwich, CT: Information Age Publishing. Huang, G., & Howley, C. (1993). Mitigating disadvantage: Effects of small-scale schooling on student achievement in Alaska. Journal of Research in Rural Education 9 (3), 137-149. Jencks, C. (1985). How much do high school students learn? Sociology of Education, 58 (2), 128135.
School size and achievement 32 Johnson, F. (1989). Assigning type of locale codes to th e 1987-88 CCD public school universe Paper presented to the annual meeti ng of the American Educational Research Association, San Francisco, CA. (ERIC Document Reproduction Service No. ED312113) Johnson, J. (2003). Nebraskas smaller school systems counter the harmful effects of poverty on student achievement. Washington, DC: Rural School and Community Trust. (Retrieved January 14, 2004 from http://ruraledu.org/do cs/nebraska/Nebraska_Matthew12-03.pdf) Johnson, J., Howley, C., & Howley, A. (2002). Size, excellence, and equity: A report on Arkansas schools and districts Athens, OH: Educational Studie s Department, Ohio University. Kennedy, J. (1915). Rural life and the rural school New York: American Book Company. (ERIC Document Reproduction Service No. ED392561) Klonsky, M. (1995). Small schools: the numbers tell a story, a review of the research and current experiences Chicago: The Small Schools Workshop. (ERIC Document Reproduction Service No. ED386517) Lee, V. E., & Loeb, S. (2000). School size in Chicago elementary schools: Effects on teachers attitudes and students achievement. American Educational Research Journal, 37 (1), 3-31. Lee, V., & Smith, J. (1995). Effects of high school restructuring and size on early gains in achievement and engagement. Sociology of Education 68 (4), 241-270. Lee, V., & Smith, J. (1997). High sc hool size: Which works best, and for whom? Educational Evaluation and Policy Analysis, 19 (3), 205-227. Mathews, D. (1996). Is there a public for public schools? Dayton, OH: Kettering Foundation Press. Meier, D. (2003). In schools we trust: Creating communiti es of learning in an era of testing and standardization Boston: Beacon Press. Miley and Associates. (2003). School district organization in South Carolina: Evaluating performance and fiscal efficiency (Prepared for The Education Oversight Committee). Columbia, SC: Author. Retrieved March 23, 2003 from http://www.state.sc.us/eoc/PDF/Mi leyReportFinalDraft010903A.doc Monk, D., & Haller, E. (1993). Predictors of hi gh school academic course offerings: The role of school size. American Educational Research Journal 30 (1), 3-21. Raywid, M. (1999). Current literature on small schools (ERIC Digest). Charleston, WV: ERIC Clearinghouse on Rural Education and Small Schools. (ERIC Document Reproduction Service No. ED425049) Raywid, M., & Schmerler, G. (2003). Not so easy going: The policy environments of small urban schools and schools-within-schools Charleston, WV: ERIC Clearinghouse on Rural Education and Small Schools.
Education Policy Analysis Archives Vol. 12 No. 52 33 Simon, H. (1979). Rational decision making in business organizations. The American Economic Review 69 (4), 493-513. Spencer, B., Frankel, M. Ingels, S., Ra sinski, K., & Tourangeau, R. (1990). National Educational Longitudinal Study of 1988: Base year sample design report (Technical Report). Washington, DC: National Center for Education Statistics. (Retrieved January 17, 2004 from http://nces.ed.gov/pubs90/90463.pdf) Snijders, T., & Bosker, R. (1999). Multilevel analysis Thousand Oaks, CA: SAGE. Stemnock, S. (1974). S ummary of research on size of schools and school districts Arlington, VA: Educational Research Service. (ERI C Document Reproduction Service No. ED140458). Tyack, D., & Cuban, L. (1995). Tinkering toward utopia: A cent ury of public school reform. Cambridge, MA: Harvard University Press. About the Authors Craig Howley Ohio University Email: firstname.lastname@example.org Craig Howley has researched rural education and pub lished widely in that field. He has taught mathematics at the University of Charleston and has evaluated mathematics professional development projects in rural schools. He is coeditor of Small High Schools That Flourish (AEL, 2000) and coauthor Out of Our Minds: Anti-intellectualism in American Schooling (TC Press, 1995). Howley codirects the Research Initiative of the Appalach ian Collaborative Center for Learning, Assessment, and Instruction in Mathematics (ACCLAIM) and is an adjunct professor in the Educational Studies Department at Ohio University. His most r ecent empirical work investigates the mediating influence of school and district size on academic achievement, construction costs of smaller schools, rural school busing, rural principals perspective s on planning. His work for ACCLAIM entails cultivation of research capacity in rural mathemat ics education. Previousl y, he directed the ERIC Clearinghouse on Rural Education and Small Schools. Aimee Howley Ohio University Email: email@example.com Aimee Howley is professor of educational studies and coordinator of the educational administration program at Ohio University. Her recent research focuses on leadership and policy issues, particularly as they pertain to rural schools and communities.
School size and achievement 34 Education Policy Analysis Archives http:// epaa.asu.edu Editor: Gene V Glass, Arizona State University Production Assistant: Chris Murr ell, Arizona State University General questions about appropriateness of topics or particular articles may be addressed to the Editor, Gene V Glass, gl firstname.lastname@example.org or reach him at College of Education, Arizona State University, Tempe, AZ 85287-2411. The Commentary Editor is Casey D. Cobb: email@example.com. EPAA Editorial Board Michael W. Apple University of Wisconsin David C. Berliner Arizona State University Greg Camilli Rutgers University Linda Darling-Hammond Stanford University Sherman Dorn University of South Florida Mark E. Fetler California Commission on Teacher Credentialing Gustavo E. Fischman Arizona State Univeristy Richard Garlikov Birmingham, Alabama Thomas F. Green Syracuse University Aimee Howley Ohio University Craig B. Howley Appalachia Educational Laboratory William Hunter University of Ontario Institute of Technology Patricia Fey Jarvis Seattle, Washington Daniel Kalls Ume University Benjamin Levin University of Manitoba Thomas Mauhs-Pugh Green Mountain College Les McLean University of Toronto Heinrich Mintrop University of California, Berkeley Michele Moses Arizona State University Gary Orfield Harvard University Anthony G. Rud Jr. Purdue University Jay Paredes Scribner University of Missouri Michael Scriven University of Auckland Lorrie A. Shepard University of Colorado, Boulder Robert E. Stake University of IllinoisUC Kevin Welner University of Colorado, Boulder Terrence G. Wiley Arizona State University John Willinsky University of British Columbia
Education Policy Analysis Archives Vol. 12 No. 52 35AAPE Editorial Board Associate Editors Gustavo E. Fischman & Pablo Gentili Arizona State University & Universida de do Estado do Rio de Janeiro Founding Associate Editor for Spanish Language (19982003) Roberto Rodrguez Gmez Hugo Aboites Universidad Autnoma Metropolitana-Xochimilco Adrin Acosta Universidad de Guadalajara Mxico Claudio Almonacid Avila Universidad Metropolitana de Ciencias de la Educacin, Chile Dalila Andrade de Oliveira Universidade Federal de Minas Gerais, Belo Horizonte, Brasil Alejandra Birgin Ministerio de Educacin, Argentina Teresa Bracho Centro de Investigacin y Docencia Econmica-CIDE Alejandro Canales Universidad Nacional Autnoma de Mxico Ursula Casanova Arizona State University, Tempe, Arizona Sigfredo Chiroque Instituto de Pedagoga Popular, Per Erwin Epstein Loyola University, Chicago, Illinois Mariano Fernndez Enguita Universidad de Salamanca. Espaa Gaudncio Frigotto Universidade Estadual do Rio de Janeiro, Brasil Rollin Kent Universidad Autnoma de Puebla. Puebla, Mxico Walter Kohan Universidade Estadual do Rio de Janeiro, Brasil Roberto Leher Universidade Estadual do Rio de Janeiro, Brasil Daniel C. Levy University at Albany, SUNY, Albany, New York Nilma Limo Gomes Universidade Federal de Minas Gerais, Belo Horizonte Pia Lindquist Wong California State University, Sacramento, California Mara Loreto Egaa Programa Interdisciplinario de Investigacin en Educacin, Chile Mariano Narodowski Universidad Torcuato Di Tella, Argentina Iolanda de Oliveira Universidade Federal Fluminense, Brasil Grover Pango Foro Latinoamericano de Polticas Educativas, Per Vanilda Paiva Universidade Estadual do Rio de Janeiro, Brasil Miguel Pereira Catedratico Universidad de Granada, Espaa Angel Ignacio Prez Gmez Universidad de Mlaga Mnica Pini Universidad Nacional de San Martin, Argentina Romualdo Portella do Oliveira Universidade de So Paulo Diana Rhoten Social Science Research Council, New York, New York Jos Gimeno Sacristn Universidad de Valencia, Espaa Daniel Schugurensky Ontario Institute for Studies in Education, Canada Susan Street Centro de Investigaciones y Estudios Superiores en Antropologia Social Occidente, Guadalajara, Mxico Nelly P. Stromquist University of Southern California, Los Angeles, California Daniel Suarez Laboratorio de Politicas Publicas-Universidad de Buenos Aires, Argentina Antonio Teodoro Universidade Lusfona Lisboa, Carlos A. Torres University of California, Los Angeles Jurjo Torres Santom Universidad de la Corua, Espaa Lilian do Valle Universidade Estadual do Rio de Janeiro, Brasil
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