achievement and inequality a seasonal perspective[1]
TRANSCRIPT
7/27/2019 Achievement and Inequality a Seasonal Perspective[1]
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American Educational Research Association
Schools, Achievement, and Inequality: A Seasonal PerspectiveAuthor(s): Karl L. Alexander, Doris R. Entwisle, Linda S. OlsonSource: Educational Evaluation and Policy Analysis, Vol. 23, No. 2 (Summer, 2001), pp. 171-191Published by: American Educational Research AssociationStable URL: http://www.jstor.org/stable/3594128
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EducationalEvaluationandPolicy AnalysisSummer2001, Vol.23, No. 2, pp. 171-191
Schools, Achievement, and Inequality: A Seasonal Perspective
Karl L. Alexander, Doris R. Entwisle, and Linda S. Olson
TheJohnsHopkins University
Are there socioeconomicdifferences n theseasonality of children's earningovertheschoolyearand
summermonths? The achievementgap across social lines increases duringtheprimarygrades, as
much researchindicates,butdescriptiveanalysesandHLMwithin-persongrowthmodels or a rep-
resentativepanel of Baltimoreschool childrendemonstrate hatthe increasecan be tracedmainlytothe out-of-schoolenvironment i.e., influencessituated in home and community).School-yearverbal
andquantitativeachievementgains are comparableor uppersocioeconomic status(SES)andlower
SESchildren,but summergains, when children are outof school, evidencelarge disparities.Duringthesummer,upperSESchildren'sskills continueto advance(albeitat a slower rate thanduringthe
school year), but lower SES children'sgains, on average, areflat. Thisseasonalpatternof achieve-
mentgains impliesthatschooling plays an important ompensatoryrole, one that is obscuredwhen
achievementscompared n an annualbasis,as is typical.Policyimplications ftheseasonalityoflearn-
ingarediscussed, ncluding upportforpreventivemeasuresover thepreschoolyearsandforprograms,
possibly includingcalendarreformsand summer chool, tosupportdisadvantaged hildren's earning
year-round.
"Pupils Lose Ground in City Schools: The
LongerChildrenStayin the System, [the]More
They Fall Behind"reads a recentheadline from
Baltimore's local newspaper (Holmes, 1997).Baltimore is where our research s situated,but
the headline could as well be about Chicago,
Philadelphia,he District of Columbia,oranyof
the nation's other arge-city,high-poverty choolsystems. The accompanying article compares
citywide readingand math achievementtest re-
sults from Grades 1 through5 againstnational
norms,comparisonswhich, as the headlinesig-nals, prove none too flattering.This hardlysur-
prises.Whenevaluatedagainstnationalachieve-
ment standards,these school systems almost
always farebadly:theirpupils lag behind in the
earlygradesand fall fartherback overtime(e.g.,
EducationWeek,1998). Suchcomparisonsden-tify a problem of immense proportions,but
whether heschool systems nthose communities
arefailingourneediestchildren,as the headline
seemsto imply, is much less certain.
When testresultsforplaceslike Baltimoreare
comparedagainstnationalnorms, t hardlycan be
said that like is beingcomparedwith like. Balti-
more'spublicschoolenrollmentn 1999was86%
AfricanAmerican Maryland tateDepartment f
Education,1999a,p.l), two thirdsof its students
received free or reduced-pricemeals, indicatinglow familyincome relative o familysize (Mary-landStateDepartment f Education,1999b),and
in morethanhalfthecity's elementary chools thelow-incomeenrollment xceeded80%(TheSun,
1999)-hardly thenationalprofile.
Recognizing that"place" s a proxy for eco-
nomic standingand other dimensions of social
advantageor disadvantageputs the headline's
comparisonof test scores in broaderperspective.The out-of-school context necessarily explainsthelag in achievement evels of low-income and
minorityyouth over the preschool period.This
has been documented recently at the nationallevel in theEarlyChildhoodLongitudinalStudy
(U.S. Department f Education,2000) and in the
Prospectsfirstgradecohort (e.g., Karweit,Ric-
ciuti, & Thompson,1994). Comparisonswithin
the city system show much the same pattern:lower socioeconomic status (SES) children in
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Alexander,Entwisle,and Olson
ourBaltimoreresearch est well below the level
of higherSES children at the startof firstgrade
(e.g., Entwisle,Alexander,& Olson, 1997).1That the out-of-school social context directs
children'sacademicdevelopmentbeforethey get
to "realschool" seems self-evident;yet the samelife circumstances hatundercut chool readiness
areeverpresent nyoung people'slives. Thedragof poverty, family stress,andcommunitydecaydoesn't suddenlyturnoff when childrenreach 6
and the school's influence begins to weigh in.
This has implications for the social patterningof achievement differentialsamong school-agechildren ust as it does among preschoolers: he
achievementgapacrosssocial lines would be ex-
pected to widen over time for reasons having
nothing at all to do with the schools.2
Thisexpectationholdsespeciallyfor thefoun-
dational curriculum hat dominates the primary
grades.Not manychildrenwill learn differential
calculus athome,oranalyzeclassicalimagery n
17th-centuryBritishliterature,but rudimentary
readingand number kills arequiteanothermat-
ter.These kinds of skills arerehearsed t home-
albeitmore so in some kinds of householdsthan
others e.g.,Hess &Holloway,1984;Scott-Jones,1984;Slaughter& Epps,1987)-and areinfused
in daily experience outside the household as
well-although, again, not in equal measure
across social lines (e.g., Entwisle,Alexander,&
Olson,1994).
Simple time trends like those at issue in the
headlinequotedaboveconfoundeffects of home,
school, and community.Do schools exacerbate
unequal choolperformance crosssocial lines or
dotheymitigatesuch nequality?Schools' contri-bution olearningroma stratificationerspective
hangson the answer,but achievementof clarity
requiressomehowbreaking hrough he family-home-schoolentanglement. ypically, his s done
piecemealthrough tatisticalmeans,as when the
influence of specific school resourcesor experi-ences (e.g., class size, perpupilexpenditures,or
curriculum lacement)s assessedconditionalon
family background.This is fine for evaluating
specificprogram ffects,butholisticunderstand-ing of the role of schoolingrequiresa different
approach e.g., Ceci, 1991).A seasonalperspectiveon learning achieves
clarityon thematterby exploiting heintermittentnatureof schooling.Children re"in" heirhomes
andcommunitiesyear-round, ut are "in"school
172
only partof the time. The long summerbreak-
currently nderassaultasantiquatede.g.,Barrett,
1990;Gewertz,2000; White, 1999)-constitutestimeout from school. For childrenwho do not at-
tendsummerschool, thispartitioning f the cal-
endarapproximatesa "schooled"-"unschooled"naturalexperiment.By this logic, differences n
the patterningof achievementgains across the
"schooled"-"unschooled"ivide oughtto impli-catetheexperienceof schooling.
How, then,does learningdifferon a seasonal
basis, and what do any such differences implyabout the schools' role with respectto achieve-
ment differences across social lines? To address
these questions,we analyzeCaliforniaAchieve-
mentTest(CAT)data romtheBeginningSchool
Study(BSS). TheBSS, an ongoing panel study,has been monitoring he academic andpersonal
developmentof a representativeandomsampleof children N= 790) whobeganfirstgrade n the
fall of 1982 in 20 of Baltimore'spublicschools.
The achievement data span 5 years, from fall
1982 (first grade for everyone) through spring1987. This period predatesrecent increases in
summer emediationprograms or children nthe
primarygrades (e.g., Cooper,Charlton,Valen-tine,&Muhlenbruck, 000), andfew membersof
the studygroupattendedsummerschool duringtheyearsatissue. Theanalysis n thatregard s a
relatively lean mplementationf the"schooled"-
"unschooled"ogic that directs attention o sea-
sonal differences n learning. n today'senviron-
ment, with summer programs proliferating,3t
would be muchharder o achievesuchclarity.
Testingwas done in the fall and springeach
year,covering5 schoolyearsand4 summers.Thistimeframespansall of elementary chool for chil-
drenpromoted achyear(about60%of thetotal)and s alignedwith the time frameof thenewspa-
perarticlewith whichwe began(Holmes, 1997).
Higherscores in the fall of the new school year(relativeo scores rom heprevious pring) eflect
summergains;higher scores towardyear's end
(relativeto scores fromthe previousfall) reflect
schoolyear gains.Figure1 illustrateshe calcula-
tionsinvolved. It is a simplematterat the level ofoperations:for summer gains, subtractspringscores from fall scores across adjacentschool
years;for school-year gains, subtract all scores
fromspringscores within schoolyears.Two kinds of assessments arereportedusing
this generalframework.The first is descriptive.
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Schools, Achievement,andInequality
Fall Spring Fall Spring FallYear 1 Year 1 Year 2 Year 2 Year 3
TestingSchedule Il I1 IFirst First Second Second
Winter Summer Winter Summer
Winter Gains:
FirstWinter: [SpringYear1 - FallYear1]Second Winter: SpringYear2 - FallYear2]
SummerGains:
FirstSummer: [FallYear2 - SpringYear1]Second Summer: FallYear3 - SpringYear2]
FIGURE 1. Illustrative imelinefor seasonal comparisonsof cognitivegrowth.
Itplotsachievement evels annuallyandon a sea-
sonalbasis for the5 schoolyears.Thesedescrip-tivecomparisons ighlighthowcomparisonsrack
acrosssocial lines, andespeciallythe insightsaf-
fordedby takinga seasonalapproachn contrast
tothemoretypicalapproachhatmonitorsperfor-
mance levels at year's end. The second assess-ment s analytic.Within-personrowthcurvetra-
jectoriesareestimatedorthe 5 years nawaythat
allows for summer "deflections"off the annual
growthtime line and for socioeconomic differ-
ences in the magnitudeof those deflections.The
descriptive omparisons,we will see, seem to im-
plicateout-of-school earningdifferencesas driv-
ing the achievementgap acrosssocial lines. The
growthcurveanalysisprovidesa rigorous est of
thisproposition.
Previous Studies
BarbaraHeynswasamong he first o articulate
theequity implicationsof a seasonalperspectiveon learning,andatthe level of issues herempir-ical work-in theprimarygradesusing nationaldata (1987) and throughgrades 5 to 7 in At-
lanta'spublic schools (1978)-is the direct-line
lineage of BSS inquiries n this area. Interest n
the seasonalityof learningdid notoriginatewithHeyns, however. Cooper, Nye, Charlton,Lind-
sey, andGreathouse(1996) review 39 relevant
studies, the oldest datingback to 1906 (White,
1906). Most of the olderstudieswere interested
specificallyin summer earning oss, though(asdistinct from summer-winterdifferentials),and
few would pass muster against contemporary
methodologicalstandards.
Such concernsled Cooperet al. (1996) to re-
stricttheirmeta-analysis o 13 studiespublishedsince 1975.TheBSS is one of the 13,represented
by two analyses(EntwisleandAlexander, 1992,
1994).Heyns'stwo studies(1978, 1987)arealsoincluded.4Cooper et al. conclude that summer
losses averageaboutonegradeequivalentmonth
across these 13 studies (on the order of .1 stan-
darddeviation[SD]relative o springscores),but
this differs across performancedomains (mathlosses exceedreading osses), grade evel (lossesarelargerat the uppergrades),andas a function
of pupil background e.g., middle-classchildren
registerreadinggainsover summer; ower-class
childrenregister osses).Here we areparticularlynterested n the sea-
sonalpatterningf achievement ains(and osses)across social lines, andthe Cooperet al. (1996,
pp.227-268) reviewrightly indsbroad imilarityto Heyns's results and those of the BSS: "The
[BSS] analyseslargelyparalleled hatof Heyns(1978).... For math concepts, the authors re-
ported a difference in achievement between
Whites andBlacks thatincreased over time and
waslargelydue to differences n summer hange.Summereffects were also stronglyrelated o the
economicstatusof children's amilies. Lower n-
come children showed greatersummer osses."
And (p. 262): "Theresults of the meta-analysis
supportHeyns's (1978) andEntwistle [sic] and
Alexander's(1992, 1994) contention hat socio-
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Alexander,Entwisle,and Olson
economic inequitiesareheightenedby the sum-
mer break."
In point of fact, the BSS conclusion is that
practically the entire gap increase across socio-
economiclines tracesto summer earningdiffer-
entials, and Heyns (1987, p.1154) finds similarresults for the Black-White earninggapnation-
ally and much the same in Atlanta (1978) for
achievementdisparitiesnvolvingbothfamilyin-
come andrace/ethnicity.Thesestudiesfindlittle
(or no) school-yeardifferentiationof achieve-
mentgainsby raceor family SES level and siz-
able summer differentiation.5 chooling, under
this accounting,mitigateseffects of social dis-
advantage n thatchildren's sizable school-year
achievementgainsdependmuch ess on home re-sources than do gains over the summermonths.
And it is impressive,we think, that this broad
agreementacross studies s evidentdespite many
methodologicaldifferences,ncludingpopulation
coverage(Atlanta, he UnitedStates,Baltimore),the achievementtests, domains of performanceandmetrics used to measure earning (quantita-tive andverbal n all instances,butotherwisedis-
similar),andgradelevel andtime framecover-
age (Grades5 and 6 at baseline in Atlantafor18 months, 18 monthsfor successive gradeco-
hortsthrough he elementary chool yearsin the
SESproject,and24 months n theBSS, withfall
of firstgradeas baseline).ThetwoBSS reports EntwisleandAlexander,
1992, 1994)reviewedby Cooperet al. (1996) ex-
aminethe first2 school yearsand2 summersof
children'sschooling, using repeatedMANOVA
measures oestimate easonaldifferencesnlearn-
ing and possible interactions nvolving schoolcontext(i.e., segregation rintegrationtatus)and
studentbackground e.g., race/ethnicity, amilysocioeconomic background). BSS work since
(e.g., Alexander& Entwisle, 1996a, 1996b;Ent-
wisle, Alexander, & Olson, 1997), largely de-
scriptive,hasplotted easonaldifferencesnlearn-
ing for 5 years, the same time frame as in the
presentinquiry.So far as we know, there is no
other tudyof seasonal earningpatternshatspans
allof elementary chool for a representativeam-ple of school beginners(in the case of the BSS,thatsample s urbanand ow income),andforthat
reason BSS research on the topic has attracted
considerable ttentione.g., Krueger,2000).6In lightof all thiswork,why revisit the issues
here?Todate,seasonal earningdifferencesnthe
174
BSS havebeen evaluatedanalytically or 2 yearsanddescriptively or 5. Thepresentpaperreports
descriptiveandanalyticresultsforthe full 5-year
period n parallel,and in so doingaddressescer-
tain questions more authoritativelythan here-
tofore. From the longer term descriptivecom-
parisons, for example, it appearsthat summer
differentialsarelarger he first 2 yearsthan ater,but this has not been evaluatedanalytically.The
growthcurveanalyses reportedhere embraceall
of theelementaryyearsin a comprehensiveway,
somethingnot done heretofore.Also, theseanaly-ses test the primacyof race versus family SES
level versus gender as the source explainingsummerlearning disparities. Ourintroductory
comments have been cast broadly in terms ofachievement differentials"across social lines,"but whether there is one "line of divide" that
dominates the others remainsto be determined.
We knowfromearlierBSS studies,forexample,that Whites register greaterachievement gainsover the summermonthsthan do African Amer-
icans,and thatupper ncome children n theBSS
registergreatersummerachievementgains than
dolower income children.But we haveyet totest
forrace differences n theseasonalityof learningnet of family socioeconomic level or for socio-
economic differences n theseasonalityof learn-
ing net of race. Theanalysesthat follow inform
all theseissues.
Methods
The BSS Research Design
Childrenwere selected forparticipationn the
BSS study througha two-stage process. First,20 schools were chosen randomlyfrom within
strata defined by racial mix (6 predominantlyAfricanAmerican;6 predominantlyWhite;8 in-
tegrated)andby socioeconomic status(14 inner
city or workingclass; 6 middleclass); then stu-
dentswererandomly ampledusing kindergartenrostersfrom the previous school year, supple-mented by first-gradeclass rostersafterschool
began in the fall. Ninety-seven percentof chil-
drenand families so selected were successfullyrecruitedntotheproject.
The Baltimorecontext is low-income urban,andthis is reflectedin the studygroup's"high-risk"makeup e.g.,Kaufman,Bradby,&Owings,
1992).TheBaltimoreCityPublicSchool(BCPS)enrollment in the early 1980s was about 77%
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Schools, Achievement,andInequality
African American;the originalBSS sample of
790 first-time (nonrepeater)first graders was
55%African American,45%White (to sustain
comparisonsby race,Whites wereoversampled).Mother'seducationforthe groupaverageda lit-
tle more than 11years,withalmost40% consist-ing of high school dropouts 44%of Whites and
34%of AfricanAmericans).According o school
records, wo thirdsof BSS families received free
or reduced-price chool meals (aboutthe same
percentageas in the school system at the time),andmanyfirstgraderswere ivingin single-parenthouseholds44%overall,ncluding30%of Whites
and 56% of AfricanAmericans).The analysis uses achievement data from
school records,demographicnformation race/ethnicityandsex) fromschool records,anddata
onfamilysocioeconomicstandingobtained rom
parent nterviews and school records.Thesedata
sources are describednext.
Data Sources
California Achievement Test (CAT) scores. When
the BSS commenced n fall 1982, theBCPS sys-
temwasadministeringheCATbattery wice an-nually, fall and spring.Two subtestsfrom the
CAT batteryareused:ReadingComprehension(CAT-V:20 items in the fall of firstgrade),and
Math Concepts and Applications(CAT-M: 36
itemsin the fall of firstgrade).Severalconsidera-
tions directedus to these particulardomainsof
performance,mainlythe importanceof the skill
areas hemselves.Additionally, eilingconstraints
wereaproblem or othercomponentsof theCAT
battery. n the springof firstgrade,for example,16.6%of the cohortreceived the highest score
possible on the MathComputation ubtestcom-
paredwith 3.5%on the MathConceptsandAp-
plicationssubtest.The correspondingiguresfor
Vocabulary notused)andReadingComprehen-sion (used) were 17.3%and3.7%,respectively.Also, modules to assesscompetence n thesetwo
areasare ncluded n all versionsof theCAT bat-
teryfromfirstgrade throughhigh school, which
means that the same cognitive domains can bemonitored hroughout.TrendsarereportedusingCAT scale scores. Theseareverticallycalibratedacrossversions of the CATbatterydesignedfor
administrationt differentgrade evels, approxi-matinga singlecontinuum f performance crossallpointsof comparison.
Sociodemographic data. Race (White = 0; African
American = 1) and gender (male = 0; female = )
are from school records,supplementedby self-
reports.FamilySESis measuredas a composite,
using informationon mother's and father'sedu-
cational evels, arankingof mother'sandfather'soccupationaltatus Featherman Stevens,1982),and receipt of reduced-price school meals, in-
dicative of low familyincomerelativeto familysize.Thefirst our ndicatorswereself-reported y
parents;he last is fromschoolrecords.Thecom-
posite is constructedas the averageof available
measures, after conversion to Z scores. Scale
scoresareavailable or787 of the 790 group,with
justunder70%calculatedon 4 or5 indicators nd
5.4%on asingle ndicator.Alphareliabilityor the386 youngsterscoveredby all five items is .86.
Fordescriptivecomparisons,a three-categoryversionof theSEScomposites used.With he cut-
tingpointsselected,mother'seducationaverages10.0yearsforthe lower SESgroup,12.0yearsfor
the middle group, and 14.6 years for the upper
group;the respectivepercentagesfor participa-tion in themeal subsidyprogram orlow-income
families are95.1, 53.4, and 13.1. There are few
genuinely wealthyhouseholds n theBSS, anditshould be understood hat the descriptorsused,
e.g., "lower"and"higher" r"upper" rerelative
to thesample's makeup. nfact,halfthecohort s
locatedin thelower SES category,a reflectionof
the study group's low socioeconomic standingoverall.
Sample Attrition
Coverageonthebackgroundmeasures s virtu-
ally complete.Sex andrace/ethnicityare knownforeveryone,andonly threecases lack scores on
the scale thatranks amilysocioeconomic stand-
ing. The CAT data,however,come from 10 test
administrationsver5 years,andmissingdataare
a concern. Coverage is sparsefor the children
(25%)whotransferredut of Baltimore's chools
during the primary grades, but absences, lost
records,and the like alsocontribute o gapsin the
testingrecord.Thereare ust 368 children of the
original790) with all 10scoresonthe CAT-V and371 with all 10 scores on the CAT-M.This has
obligedus toconsider heconsequencesof sampleattrition arefully.The firstand thirdcolumns of
the Appendixshow how youngsterswith com-
plete testingdatacomparewiththeoriginalsam-
ple on various measures from first grade. The
175
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Alexander,Entwisle,and Olson
comparisons rereassuring: espiteahighdegreeof sample oss, attritions not selectivealongaca-
demic lines andonly moderatelyselectivealongsociallines.
Accordingly,all availabledataareusedin the
analysis.The only cases screened out arethosefor whom growth trajectories annotreasonablybe estimated:those with fewer than threeover-
time datapointsperachievementdomain(three
beingtheminimumnumberrequired o estimate
a growthtrajectory,allowingfor curvature)and
those lacking "anchoring" aseline scores from
the fall of firstgrade.These restrictionsyield a
(maximum) case base of 665 for the CAT-V
analysisanda base of 678 forthe CAT-Manaly-
sis.7 These "restrictedcoverage" samples like-wise evidencelittle attritionbias (see Appendix).
Results
AnnualversusSeasonalAchievementGains
What,then,does theachievementpatternook
like in the BSS when assessed spring-to-spring,thestandard pproach?Table 1 shows that ower
SES youth already lag behind theirupperSES
peers n firstgrade byabout0.7 SD on bothCAT
subtests),and after 5 years they arefartherback
still (by more than 0.9 SD). Raw score differ-
ences (i.e., numberof CATpoints)likewise start
outlargeandincrease,but these arenotadjustedfor theincreasingdispersionon scores overtime
andso must be interpretedwithcare.8
LowerSESyoungstersn the BSS thus arenot
keepingup.This s thepatternypicallyseenwhen
achievements assessedatyear'send-indeed the
newspaper rticlewithwhich webegancouldwell
have been writtenabout the experience of our
studygroup.Withthese resultsas a frameof ref-
erence,how does thepicturechangewhenschool-
year and summerachievementgains are calcu-latedseparately?Thisis done in Table2,9andthe
exerciseinformsa whole hostof issueshavingto
do with schools andachievement.
First,CAT gainspostedwhile childrenare in
school (tophalf of Table2) exceedgainsoverthe
summermonths(lowerhalf of Table2), with the
school-yearmarginof advantage arge whether
calculated s raw scoregainsorgainspermonth.10
TABLE1
SpringCATPerformanceLevels Over Five Years,by FamilySocioeconomic Status
(RestrictedSamples,N = 665, 678)
FamilySES evel Spring83 Spring84 Spring85 Spring86 Spring87
CAT-Vmean
(Reading)LowSES 329.15 375.95 397.92 433.58 461.17(N) (329) (308) (282) (274) (292)Mid SES 348.68 388.43 423.93 467.52 495.51
(N) (161) (144) (120) (118) (129)HighSES 361.01 418.09 460.81 506.20 534.60(N) (150) (137) (109) (99) (93)High-lowdifference 31.86 42.14 62.88 72.62 73.43Pooled SD 45.65 48.39 57.85 69.77 73.92
Difference/pooledSD .70 .87 1.09 1.04 .99
CAT-Mmean
(Math)Low SES 331.27 371.87 397.80 427.63 357.76
(N) (339) (315) (289) (281) (295)Mid SES 350.45 387.08 418.88 457.76 491.66
(N) (162) (146) (122) (122) (134)High SES 357.39 407.30 448.09 487.02 514.62
(N) (147) (135) (110) (98) (91)High-lowdifference 26.12 35.42 50.29 59.39 56.85Pooled SD 36.53 38.54 48.25 54.64 60.97
Difference/pooledSD .72 .92 1.04 1.09 .93
CAT,California chievementest.
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Schools, Achievement,andInequality
TABLE2
CATAchievementGainsbySeasonandSocioeconomicLevel:Five Winters,Four Summers
(RestrictedSamples,N = 665 [Verbal],678 [Quantitative])
CAT-V Reading) CAT-MMath)
Season Low SESa Mid SESaHigh
SESa Low SESa Mid SESaHigh
SESa
Wintergains1st 55.94 (2.64) 69.86 (3.55) 60.09 (3.37) 48.84 (1.64) 53.79 (2.11) 43.71 (2.46)2nd 46.00 (2.31) 43.19 (3.06) 39.82 (3.50) 42.35 (1.42) 44.06 (2.06) 42.92 (2.22)
3rd 30.46 (2.17) 34.34 (3.48) 34.68 (3.76) 35.50 (1.56) 35.68 (2.27) 35.96 (2.39)4th 33.57 (2.24) 41.29 (3.15) 28.52 (4.26) 32.94 (1.50) 32.88 (2.49) 34.71 (2.76)
5th 25.28 (2.22) 27.86 (3.37) 23.58 (4.19) 24.35 (1.82) 30.90 (2.72) 26.35 (3.31)
Totalgain 191.25 216.54 186.69 183.98 197.31 183.65
Meangain/ 4.78 5.41 4.67 4.60 4.93 4.59
monthb
Summergains1st -3.67 (2.49) -3.11 (3.46) 15.38 (3.05) -4.89 (1.59) -8.22 (2.22) 7.18 (2.66)2nd -1.70 (2.26) 4.18 (3.60) 9.22 (4.00) -5.18 (1.67) -.50 (2.50) 3.14 (2.74)3rd 2.74 (2.21) 3.68 (3.82) 14.51 (4.33) -1.25 (1.57) 6.15 (2.74) 2.28 (2.78)4th 2.89 (2.56) 2.34 (3.21) 13.38 (4.42) 5.50 (1.59) 4.31 (2.67) 6.30 (3.39)Totalgain .26 7.09 52.49 -5.82 1.74 18.90
Meangain/ .02 .44 3.28 -.36 .11 1.18
monthb
Note.Standardrrors rereportednparentheses.CAT,Californiachievementest.a
Samplesize rangesfor seasonalgains:Low SES N= 264-339; Mid SESN= 113-162; High SES N= 85-150.bBased on 8 monthsof winter(Oct-May),4 months of summer June-Sept).
Children, t is reassuring o see, learn more and domain losses predominateand are especiallylearnmoreefficientlywhentheyare nschool.Sec- largeover the first wo summers.Thismeans that
ond,verbalgainsover the summergenerallyex- lower SES children generally start the new
ceedquantitative ains, suggesting hat,at leastin school year aboutwhere they had been the pre-the early grades, quantitative earning is more vious springor even behindtheirspring evels of
school-dependent hanverbal learning.Cooper performance.
et al.(1996)reachasimilar onclusion.Third, on- UpperSES children's cores,on the otherhand,sistentwiththe dea that heperiodof earlyschool- improveover the summermonths lowerpanel) n
ing is foundationalEntwisle& Alexander,1989, both domains,which means thatthey begin the1993), school-year gains generallyarelarger he new school year aheadof where they had been
first woyearsthan ater. thepreviousspring.And the summerdifferences
Theseinsightsalone would be amplereasonto comparingowerandupperSES youtharelarge.examinelearningon a seasonalbasis;however, This is easiest to see when the year-by-yeardif-
ourpresent nterest centers on a fourth ssue in- ferences are summedacrossyears(i.e., the"total
formedby Table 2:howCATgainsdifferby sea- gain"entriesnthe lowerpanelof Table2). These
son accordingto children'sfamily background. totalsfavorchildren romupperSES households
School-yeargains yearby yearare not very dif- by sizable margins,with the differences largeferentacross SES levels (upperpanel).Indeed, n enoughto account or almost the entireCATgap
theearlyyearsthecomparisons ometimes favor increase hatemergesoverthe first5 yearsof thelower andmiddleSES childrenover upper.The panel'sschooling.Comparehe scalescorediffer-
summerpatterns strikinglydifferent hough,es- ences from springof 1983 to springof 1987 in
pecially across the SES extremes.In the verbal Table 1 againstthe cumulativesummer differ-
area, then, lower SES youth essentially tread ences in Table2." At the endof 5 years,theper-water,some summersgainingafew points,some formanceof lower SES children ags farbehind,summers osing a few, while in the quantitative but Table2 clarifieswhatis at issue. Duringthe
177
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Alexander,Entwisle,and Olson
schoolyearthese childrenkeep up,buttheybeginfirstgradealreadybehindandduring he summer
months,when they are not in school, their skills
registerverylittleimprovement.These descriptivecomparisonsthus seem to
implicate helong summerbreakas the sourceoflower SES children's achievementshortfalldur-
ing theprimarygrades.Theanalysesreported n
the next sectiontest whether the summer short-
fall sufferedby lower SES childrenrelative to
upper s statisticallyreliable.
Modeling the Time Line of Cognitive Growth
on a Seasonal Basis
Analysis plan. Hierarchical linear modeling
(HLM) s used to estimatewithin-person chieve-ment growth models (Bryk, Raudenbush,and
Congdon, 1996; Bryk and Raudenbush, 1992).12
Person-specificgrowthparameters re estimated
at the within-person, r Level 1, stage.These re-
sultsdefine the time line of CATgainsacrossthe
entiresample-essentially the averageortypical
pattern.Thebetween-person,or Level 2, param-etersevaluatevariabilityn theLevel 1parametersinrelationo traits hatvaryacrosspersons.So, for
example,do school-yearand summerCATgainsdifferfor lowerandhigherSESyouth?Ourmajorinterest centers on family SES, but effects of
race/ethnicityand gender are also controlled at
Level 2 to guardagainstconfounding.Two variantsof the model are evaluated.Both
specifications fit three growth parameters at
Level 1: a baseline ntercept erm;alineargrowthterm;and a quadraticermto allow for curvature
in the growth trajectory the rate of gain is ex-
pectedto decline over ime,e.g., Schneider,1980;Stephens,1956). The two models differ in how
adjustmentso theschool-yearpattern f achieve-
mentgainsare estimated.The first mplementsa
single summer adjustment erm to gauge how
summergainsdiffer fromwintergains on aver-
age. However,because the summergain differ-
entialby family SES level seems to vary across
years (see Table 2), the second growth model
estimates a separate adjustmentterm for each
summer.The datarequirements or estimating he sec-
ond specificationof summer deflections are se-
vere,however.At Level 1,person-specific rowth
trajectories re derived.Withseparate odingfor
each summer, hese models fit seven parameters
(intercept, rowth,growthsquared, ndfoursum-
178
meradjustmenterms)to a maximumof 10 data
points(fall andspringCAT scores over 5 years).Thisapproacheshe limit of the nformation vail-
able,andHLMscreensoutmanycases becauseof
strategic aps n thetestingrecord.Numbers ange
from 448 to 458 when fourseparate ummerad-
justmentparameters re estimatedversus 646 to
656 when a single, averagesummeradjustmentis estimated. Notwithstanding such technical
concerns, attritionbias owing to missing CAT
dataseemsminor(see Appendix),and allmodels
converged.Maximum ikelihood estimatesof parameters
in the Level 1 andLevel 2 equations or the four
summer ermmodels areas follows:13
Level 1 Model: Within-PersonGrowth
Trajectories
Yti = Pi + PliSlti + 2iS2ti + 3iS3ti + 4iS4ti
+ P5T5ti+ 6iT2i+ ?ti,
where
Ytis CATlevel at time t for student ,
SltiS4tiare summeradjustmentdummyvari-
ables,
Ttis time, coded at 0 for fall 1982 and incre-
mentedby unit steps thereafter or each testingoccasion(springandfall),
T, is time squared o allow fornonlinearityn
the growthtrajectory,
P0i s the expected baseline CAT value for
child i,
pli... p4i are summer adjustments to the
school-year earningrate for student ,
P5i and p6i map the learning rate during the
school year,
?ti is an estimate of person-level disturbance.
Level2 Model: Between-Person
BackgroundContingencies14
3oi =Too + TcoiSES, TC02RACE/
+n;o3SEX, + Voi
P-i ...iP4= .10.. T740 + T-11 ... 741SESi
+712 ... t42RACE,
+713 ... 7143SEXi + V...4i
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Schools, Achievement,andInequality'
35i = t50 + 7i51SESi+ t52RACE,
+7153SEXi + V5i
p6i=
T60 + V6i
where
o0i,Pli ... 4i, I5i, 36i reperson-levelparam-eterestimatesfromthe Level 1 model,
it'sareLevel 2 parameter stimates(interceptand slopes), and Voi .. . v6i are Level 2 random
effects.
Growth models with a single summer adjustment.
Table3reports stimates orgrowthcurvemodelsthat ncludeasingle,average, ummer-adjustmentterm.Resultsfor CAT-V arereportedon the left
side of the table,for CAT-Mon the rightside.15
The firstLevel 1 equation(columnI) fits linear
and quadraticgrowth terms,with time set to 0
at baseline (fall 1982, or fall of firstgrade)and
incrementing one unit per subsequent testingoccasion.
Children'sCAT averagesat the start of first
gradeare n thevicinityof 300 scalepoints nbothdomains.Both baseline means are significantlydifferentrom0, as areall fourgrowth erms,with
coefficientestimates orthequadraticermsnega-
tivelysigned(-.96 forCAT-V; .47 forCAT-M).This indicatesthat the rateof growthslows over
time,asexpected.Thesedetailsof thegeneral ime
line of achievementgrowthall areunexceptional.
However,the specification n column I does not
adjust or summerdifferences,whichmeans that
theparameter stimatesdescribe hegrowthpathperiodby period N= 10)withoutregard opossi-ble differencesby season.
The second column of results evaluates
between-person variability in these growth
parametersn relationto family SES (heremea-
suredusingthefull scale metric),sex (withgirlscoded "1") and race/ethnicity (with African
Americanscoded"1").Becauseof thewayLevel
1andLevel 2 parameterstimatesare"linked"n
the HLMframework, he Level 1 coefficientsincolumn IIareanalogous o interceptestimates n
OLS regression-they represent the expectedvalueof thedependentvariable or thegroupde-
finedby the intersectionof Level 2 predictorsat
score0. In thepresent nstance,thatcorrespondsto White males with average family SES
scores-recall that the SES scores are standard-
ized. Theinterceptestimateof 292.11 in column
II of the CAT-Vresultsthus s theexpectedscore
of suchyoungstersat baseline(fallof firstgrade).The associatedLevel 2 coefficients arenet incre-
mentsor decrements o thatlevel of test perfor-mance at school entry associatedwith, respec-
tively, contrastingvalues of SES, race/ethnicity,andsex. ForCAT-V, effects of family SES and
sex aresignificant.WithSES scaledin SD units,its associated coefficient in Table 3 indicates a
16.25-pointCAT-Vdifferenceat thestartof first
grade orchildren1 SD apartn familySES. The
SD of the CAT-Vdistributionat baselineis 40.8
points, so 16.25 points corresponds to about
.40 SD.16 The difference, as expected, favorschildren n upperSES households.The CAT-V
results also show girls' scores slightly above
boys' at baseline.
TheLevel 2 SES difference s much the same
for CAT-Mperformanceas for CAT-V, exceptthat the CAT-Mgenderdifference s not signifi-cant and the racedifference s. AfricanAmerican
children n thissamplestartschool a littlebehind
their White counterpartsn the quantitativedo-
main.The4.8pointdifference,net of SESandsex,correspondsoroughly 15CAT-MSD,about he
samemagnitudeas theboy-girldifference n the
verbaldomain.
The SES differences are the largest of these
Level 2 effects on baseline performance.The
growth ermsshowwhathappens rom thatpointforward.Because the trend s nonlinear, he two
terms that describe the growth pathhave to be
evaluatedointly.However,becausepreliminary
analysesrevealed no Level 2 effects on the de-celerationparameters, n Table 3 (and later, in
Table4) only the "main-effect" erms arespeci-fied as contingenton Level 2 influences. Under
thatframework, ower SES youths' rate of gainover theelementaryyears agsbehindupperSES
youths' in both domains, African American
youths' ratelags behindWhite youths' in both
domains,and,boys' rate lags behindgirls', all
significantat the .01 level.
In theseresults, hen,lower SESyouthfall far-therback overtime,as seenby plotting averages
(Table 1).However,these estimatesdo notallow
for seasonal differences in growth trajectories.Whether herearesuchdifferences,andhowtheyaffect growth patternsacross social lines, is as-
sessed in columnsIIIandIV of Table 3.
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TABLE 3
GrowthCurveAnalysisEstimatedWitha Single AverageSummerAdjustment
CAT-V (Reading)
Model I Model II Model III Model IV Model I
Intercept 293.63 (1.45) 292.11 (2.39) 286.84 (1.49) 285.70 (2.45) 302.40 (1.19) 3
SES 16.25 (1.63) 17.56 (1.67)Race -1.26 (2.59) -1.34 (2.66)
Sex 6.05 (2.53) 5.57 (2.60)Lineargrowthterm 29.56 (0.71) 29.90 (0.79) 48.17 (1.06) 47.34 (1.68) 23.36 (0.43)
SES 3.11 (0.33) -.34 (1.08)Race -1.98 (0.51) -1.44 (1.69)
Sex 1.72 (0.50) 2.91 (1.64)
Quadratic rowthterm -.96 (0.07) -.94 (0.07) -.93 (0.07) -.91 (0.07) -.47 (0.04)Summeradjustment -38.93 (1.62) -36.38 (3.03)
SES 7.11 (2.10)Race -1.25 (3.29)Sex -2.44 (3.20)
Note. Standard rrorsare shown in parentheses.Bolded entriesaresignificantat the .05 level. Within-person,Level 1 growthcurveestimatesare talicized.Coefficients fo
fects. Forthe CAT-V analyses,Ns rangefrom646 to 665; for the CAT-Manalyses,Ns rangefrom656 to 678.
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Schools, Achievement,andInequalit'
ColumnIII addsa single summeradjustmentterm to the general time trend to representan
averageeffectacross hefoursummers ubsumed
underthe model's 5-year time frame.The sum-
meradjustment oefficientsfor bothCAT-Vand
CAT-Marenegativelysignedandhighlysignif-icant,but smallerthan the correspondinginear
growth coefficients. The descriptivepattern n
Table2 suggestedthatgrowthslows duringthe
summerrelativeto school-year growth,and the
resultshereareconsistentwith thispattern.How-
ever, because the summercoefficients are ad-
justments to the per period growth that would
otherwisebe expectedover the intervalat issue,the summerdeflection coefficientsin Table3 do
notrepresent ummerdrop-offorgainperse. Tocomparewinterandsummergainspreciselyre-
quiressome additionalcalculations.
"Time,"as construedin this analysis, is di-
vided into incrementsin which one unit corre-
sponds to one season, fall to spring, spring to
fall. To see themodel's implicationsin terms of
actualsummergrowth(orloss), we firstneed to
derive the growth implied at time "t" by the
general growth specification (i.e., linear and
quadratic erms)andthen correctthat estimate
for the summer-winter differential. The first
partof the calculation is accomplishedby tak-
ing the first derivative of the equationimplied
by column III at time t. Evaluatingthe CAT-V
equationat t= 2, forexample, yields anestimate
of (instantaneous)growth n the fall of year2 of
44.45 CAT-V points. Adjustedfor the averagesummer deflection (-38.93, from Table 3), the
average expected gain for the first summeris
5.52 CAT-V points.17 Similar calculations
could be done throughout,and in general themodel indicatesa slower rate of cognitive gainover the summer months compared with the
school-yearrateof gain.ColumnsIV of Table 2 add Level 2 predictors
to the model to test whetherthe within-personLevel 1 interceptestimates,growth-termparam-eters, and summeradjustmentcoefficientsjustreviewed vary significantlyin relation to SES,
race/ethnicity,and sex. Adding these terms ad-
dressesourmainsubstantive oncern:TheLevel2effects in column II establish that the SES gapwidens over time, but does this happen to the
samedegreesummerand winter?
SeveralchangesareevidentcomparingLevel2
effects acrosscolumnsII and IV. The race coeffi-
cient in the CAT-V growthtermresultsis non-
significant,orexample,as is thesex coefficient n
the CAT-Mresults.However, consequencesfor
the family socioeconomicstatuseffect standout
especially:whereaspreviously he SES effect on
growthwas largein bothdomains, n columnIV
both SES effects arenonsignificantandtriviallysmall.The frameof referencen the two instances
is different,hough,andthis is fundamentalo the
interpretation:hegrowthparametersncolumnII
describethepatternof growthacrossall periods;in columnIV, with the summeradjustmenterm
included n themodel,thegrowth ermspertaino
school-yeargrowth specifically.Socioeconomic
statusthusapparentlyhas no bearingon achieve-
mentgainsduring heschoolyear.Not soforsum-
mergains-the Level2 SES effect on the summeradjustmentoefficient s highly significantnboth
the CAT-V andthe CAT-Mresults(see column
IV). Andbothcoefficientsarepositivelysigned,whichmeans hat henegativesummeradjustmentis attenuatedor upperSES childrenrelative to
lower SES children.
Theimplicationsof thisadjustment re easiest
to seewhenexactsummergainsarecalculated,as
above. As an example, for childrenscoringone
standarddeviation below the samplewideSESmean,thepredictedCAT-Vchangeoverthefirst
summeris +.55 points;for children at the SES
mean, the predictedfirst-summergain is +7.32
points; and for children one standarddeviation
above theSESmean,thepredictedgainis +14.09
CAT-Vpoints.18As mentioned,race andgenderdifferences n-
volving school-year growth are also attenuated
when the summeradjustments implemented, l-
thoughAfricanAmericans' chool-yeargainsstill
lagbehindWhites'school-yeargainson theCAT-
M, and there s aborderline ignificantdifference
favoringgirlsontheCAT-V. But the seasonalad-
justmenthas itsgreatest ffecton the size andpat-
terningof SESdifferences,with achievementdis-
parities largeraltogetheracross socioeconomic
lines than across racial/ethnicand genderlines.
Whenthemetriccoefficientsreportedn Table3
arestandardizedn overallverbalgrowth o com-
pareeffect sizes across Level 2 predictors,the
effect coefficients n columnII become:SES, .32;race, .23; sex, .17. However,becausesignificantSES differencesemerge only during hesummer,
theymustbe traced o sourcesoutsideschool.
Growth models with separate summeradjust-ments. Table 4 reportsresults for the growth
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Alexander,Entwisle,and Olson
TABLE 4
GrowthCurveAnalysis WithFour SeparateSummerAdjustments
CAT-V Reading) CAT-MMath)
Model I Model II Model I ModelII
Intercept 283.23 (1.54) 282.63 (2.55) 293.10 (1.20) 297.42 (1.92)SES 16.58 (1.75) 16.86 (1.33)Race -.82 (2.78) -4.26 (2.12)Sex 3.77 (2.72) -1.62 (2.08)
Lineargrowthterm 57.22 (1.51) 56.03 (1.96) 49.24 (0.96) 49.85 (1.31)SES -.62 (1.06) -.51 (0.75)Race -.87 (1.66) -2.04 (1.18)Sex 3.16 (1.61) .97 (1.15)
Quadratic rowthterm -2.01 (0.14) -2.01 (0.14) -1.35 (0.09) -1.35 (0.09)1stSummer -48.80 (2.50) -47.79 (3.99) -47.70 (1.76) -47.12 (2.81)
SES 11.04 (2.58) 4.48 (1.82)
Race -3.32 (4.10) -.01 (2.89)Sex 2.90 (3.99) -.33 (2.83)
2nd Summer -47.96 (2.10) -38.89 (3.83) -43.74 (1.43) -43.40 (2.63)SES 5.90 (2.62) 6.94 (1.81)Race -7.72 (4.12) 1.55 (2.85)Sex -7.70 (4.00) -.85 (2.79)
3rdSummer -31.79 (2.13) -33.10 (3.95) -33.55 (1.51) -33.32 (2.76)SES 7.95 (2.68) 3.60 (1.86)Race 2.94 (4.21) -.42 (2.92)Sex 0.00 (4.09) .93 (2.85)
4th Summer -20.14 (2.52) -15.66 (4.26) -22.30 (1.79) -25.63 (2.97)
SES 5.90 (2.74) 3.04 (1.89)Race -1.19 (4.25) 2.83 (2.92)Sex -5.98 (4.11) 4.19 (2.84)
Note.Standardrrors reshownnparentheses.Bolded ntries re ignificanttthe 05 evel.Within-person,evel1growthurve stimates re talicized.CoefficientsorSES,race,and sex arebetween-person,Level 2 effects. ForCAT-Vanalysis,N= 448; forCAT-M,N= 458.
model specification that implements separatesummeradjustments or each summer.Despitethereducedsamplesize because of missingdata
when summersare indexedindividually,the re-sults that arecomparableacrossTables 3 and 4aresimilar(e.g., school-yearCAT gains still donotrespond o familySESin eitherdomain).
And whatof the moredetailedspecificationofthe summeradjustmentcoefficients? All eightsummeradjustment ffects are significant(withthe estimates for summers 1 and 2 largerthanthose forsummers3 and4 inbothdomains),andfor six of the eight, the Level 2 effect of family
SES is also significant.These summeradjust-ments all favor upperSES children.However,the evidence thatsummergains areconditionalon SES is morecompellingforthe firsttwo sum-mersthan or the lasttwo, atleast forquantitativeachievement.These results husgive limitedsup-portfor the idea that the first2 yearsof elemen-
182
taryschool aredistinctive,butstrongsupport ordifferential summerlearningover the primarygradesas thescaffolding hatsupportsdisparitiesin school achievementacross social lines. LowerSESyouthstartout behind(i.e., the baselinedif-ferences are significant)and duringthe school
year they keep up, but duringthe summerperi-ods theirgains fall short of those registered byupperSES youth. These details of the seasonal
patterningof disparities n achievement n read-
ing and math all accordwiththedescriptivepat-ternseen earlier,but they arespecific to familysocioeconomic level: none of the summer ad-
justmentcoefficients for sex or race/ethnicitysfully significantundereitherspecification.
Discussion
The seasonalpatternof learning,documented
here in Baltimore,but also at the national level
(e.g., Heyns, 1987;Karweit,Ricciuti,& Thomp-
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Schools,Achievement,andInequality
son, 1994) andin otherlocalities, includingAt-
lanta Heyns,1978),NewHaven Mumane,1975),andTexas(O'Brien,1998),undercuts omelong-
standingbut mistakendeasaboutschools andso-
cialinequality:hatschoolsare neffectualandun-
abletoequalizeeducational pportunity,rworsestill that they actively handicapdisadvantagedchildren.The "ineffectual" otiontraces o a mis-
readingof the Colemanreport(Coleman,et al.,
1966)that "schoolsmake no difference; amilies
make the difference"(quote attributedo D. P.
Moynihan n Hodgson, 1973), and has been re-
inforced inceby overstated laimsthatschoolre-
sources have little bearingon achievementout-
comes (e.g., see, on the one hand, Hanushek,
1994 and 1997 against,on theother,Finn, 1998;Hedges,Laine,& Greenwald,1994;Wenglinsky,
1997),while the"complicity" rgumentindssup-
port n glaring undingdisparitiesacrosswealthyandpoorcommunities e.g., Kozol, 1991).
Families and communities ndeed shapechil-
dren's academic development. Their power is
evident in the large learningdifferences across
family SES levels seen in the present results
for the summermonths;but schooling, too, is a
powerfulforcebehindchildren'sacademicdevel-opment. Certainlymanydisadvantaged hildren
areheld backby inequitiesin the distributionof
school resourcesand associated"opportunitiesto learn" (e.g., Dougherty, 1996; Murphy &
Hallinger,1989;Oakes,Gamoran,&Page,1992),but this piecemeal approachmisses schooling'smoregeneralized,salutaryeffects. Thenearpar-
ity of school-year earningacrosssocial lines es-
tablishes hat schoolsplayanimportant ompen-
satory ole,carrying longdisadvantagedhildrenat a pace close to that of their more advantagedclassmates.
Schools do matter,andthey matterthe most
when support for academic learning outside
school is weak. School-basedpublic resources
do notcompletelyoffset themanyandvariedad-
vantagesthataccrueto childrenof privilegebyvirtue of privatefamilyresourcesoutsideschool
(e.g., Coleman, 1990). It is a stretch o thinkthat
theywould,but thisis theimplicitstandardwhentest results in Baltimore's schools are found
wantingagainstnationalnorms.
The powerful role of schools in fosteringachievement of all children is one lesson in-
formedby a seasonalperspectiveon learning.A
second is that disadvantagedchildren, on the
whole, arecapable earners.Theykeepup duringthe school year,but before they startfirstgradeand in summers between grades the out-of-
school resourcesavailableto themarenot suffi-
cient to supporttheir achievement. When our
study groupstartedschool theirpre-readingand
pre-math kills reflected heir unevenfamily sit-
uations,andthese initial differenceswere mag-nifiedacrosstheprimarygradesbecauseof sum-
mer setback despite the equalizing effect of their
school experiences.
No doubt,material esources,amilyprocesses,and affectivecontext all are implicated n these
summerdifferences see Entwisle,Alexander,&
Olson, 1997, 2000). If theproblem racesto dis-
advantaged children's out-of-school resource
shortfallalong these lines, as appearsthe case,thenextendingthe school's reachthroughyear-roundschooling(Gandara& Fish, 1994),home-
schoolpartnershipshatcontinuewhen school is
closed (Epstein, 1991, 1992), and high-qualitysummerprograms Cooper,Charlton,Valentine,& Muhlenbruck,2000) would seem promisingavenues.Indeed,all hold promise,but no single
programor intervention s
likelyto
provesuffi-
cient.Accordingly,we concludebysketchingour
thoughtson what a morecomprehensiveagenda
mightentail.
Prevention,as a rule, is easier thanremedia-
tion. Accordingly, minimizingthe achievement
gap at the point of school entry should be the
firstpriority.We know thatgood preschoolscan
improve disadvantagedchildren's later school
success-not just in test performance,but also
in reductionof retentionrisk,assignment o spe-cial education, and even high school dropout
(Ramey,Campbell,& Blair, 1998;Schweinhart
& Weikart, 1998; Temple, Reynolds, & Ou,
2000).19At present,though,disadvantaged hil-
drenarethe ones least likely to attendpreschool
(NCES, 1998).
Disadvantagedchildren also need to attend
high-quality, full-day kindergartenprograms.
Today kindergartens nearlyuniversal-on the
orderof 98%of childrenattend,20with the ma-jority in full-day programs(59% in 1998, e.g.,U.S. Bureauof the Census, 1999b).And owingto targeted ederal and statesupplemental und-
ing (e.g., Title I), lower income children,not
upper,moreoftenattend ull-dayprograms e.g.,
Rothenberg,1995; U.S. Bureauof the Census,
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Alexander,Entwisle,and Olson
1999b).The situation was quitedifferentin the
early eighties, though,whentheBSS cohortwas
kindergarten ge.Thenpart-timeprogramswere
thenorm(U.S. Census, 1999a).21Tenpercentof
BSS first-graders ad no kindergarten ndmore
of those fromthepoorestfamiliesattendedhalf-
dayprograms.Does this matter? Our evidence certainly
suggests that it does. The benefits of full-dayas
compared to half-day kindergartensfor BSS
children are considerable. With family back-
ground and many other variables allowed for,firstgraderswho attended ull-daykindergartenwere absent fewer days in firstgrade,were less
oftenretained,and earnedhighermarksandtest
scores in first grade than half-day attendees
(Entwisle,Alexander,Cadigan,& Pallas, 1987;see also Cryan, Sheehan, Weichel, & Bandy-Hedden, 1992; Karweit, 1989).
Preschool and kindergartencan reduce the
achievementgapassociatedwithSES when chil-
dren startfirstgrade,but to help them keep uplater will requireextraresourcesandenrichment
experiences, often of the sort thatmiddle class
parentsroutinelyprovidefortheirchildren.This
leads us to supportsummer school or extended
year programs ustfor poor children as well as
supplemental chool-yearservicesfor these chil-
drenduring heearly grades.The Chicago LongitudinalStudy shows that
intensesupplementation f learningresources n
theearlygradeshelps poorchildrenmaintain he
academic edge they get from attendinga good
preschooland that these benefitsthen continue
into theuppergrades(Reynolds,1994;Reynolds& Temple, 1998;Temple, Reynolds,& Miedel,
1998). It is importanthat, n the Chicagostudy,neitherpreschoolalone nor school-yearsupple-mentationalone proved sufficient.Rather,theyare most effective in combination,one buildingon the other.
TheChicago ntervention s not a summerpro-
gram,but in light of the presentresultsit seems
reasonablethat summer enrichmentprograms
specifically for disadvantagedstudents beforeandafterfirstgradewould confersimilar, f not
greater,benefits. But how shouldthese summer
programsbe designed?Certainlynot like sum-
merprogramsof thepast,whichfunctionedso asto magnify,not shrink,disparitiesacrosssocio-
economic lines (e.g., Cooper, Charlton,Valen-
tine, & Muhlenbruck,2000; Entwisle, Alexan-
der,& Olson, 2000; Heyns, 1978).A strongcurriculumcomes first, focused on
reading, t being the foundation or all that fol-
lows. Heyns(1978)foundthat hesinglesummer
activitymost stronglyandconsistentlyrelated o
summerearnings reading,whethermeasuredbythe numberof booksread,by the timespentread-
ing, orby theregularity f libraryusage.Reading
during he summer ncreased he vocabulary est
scores of childrenand had a substantial ffect on
achievement argely ndependent f familyback-
ground.Likewise, BSS children's use of the li-
braryn summer,
specially akingoutbooks,
pre-dictedsummergains n achievement.Educational
policies that increaseaccess to books, perhaps
through ncreased ibraryservices,stand to have
animportantmpacton achievement,particularlyfor less advantagedhildren.
But summerschools shouldnot be limitedto
traditionalacademics. Summerprogramsso far
have not addressed the unique contribution that
parentsandneighborhoodsmakewhen school is
cut off. We found thatbetteroff children n theBSS moreoften wenttocityandstateparks, airs,or carnivalsandtookdayorovernight rips.Theyalso took swimming,dance, andmusic lessons;visited ocalparks,museums, ciencecenters,and
zoos; and more often went to the library n sum-
mer. And childrenwho lived in betterneighbor-hoods alsoplayedmoreorganizedsports n sum-
mer.Sports ike soccer,fieldhockey,and softball
require hildren olearncomplicated ulesystems
and takemultipleroles. They also can stimulateinterestntopicslikebattingpercentages,oddsof
winningorlosing,andthelike.22These activities
surelyare not the only ones thatmatter,buttheyall support earningoutside the traditional lass-
roomsetting,and thatgives childrenanedge.
Buildingon suchleads,probably ummerpro-
gramsfordisadvantagedhildrenshouldsupple-ment academics with a heavy dose of physical
activityandenrichment xperiences.Suchanex-
panded agendais important or anotherreasonalso:to make summer choolfun.Learningworks
best when children feel they arepartners n the
enterprise.Torealizetheirpotential, ummerpro-
gramsshouldbe engagingandnon-punitive.For
manydisadvantaged,poor-performinghildren,
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Schools,Achievement,andInequality
"school" s synonymouswith"failure." or them
school is not fun, it is punishing.This may be a
particularproblemin mandatoryprogramsfor
children who fall short of promotionguidelines
(e.g., Bracey, 2000; White & Johnston,1999).
Puttingapositivespinon thatwill not beeasy,butit could well be key.
Thesesuggestionshighlight he need to supple-ment"regular chooling" hrough long-term, o-
ordinatedprogramof interventionsembodying"bestpractice"principles.For such interventions
to counteract he powerful out-of-school forces
thatkeep too many disadvantaged hildren rom
achievingat the level of theirpotential, heywill
have to betargeted t low-incomechildren pecif-
ically (e.g., universalpreschoolor summersup-
plementationorallstudentswould notbe consis-
tent with thismodel;see Entwisle, Alexander,&
Olson,2000).Suchprogramswillneedtobeginas
early as age 3 and continue thereafter n a sus-
tainedway.And eventhen,"reasonablerogress"
oughtto be therealisticexpectation.We say this because even the best of today's
remedies all fall shortof achieving"successfor
all"(e.g., Farkas,Fischer, Dosher,
&Vicknair,1998; Pinnell,Lyons, DeFord,Bryk, & Seltzer,
1994;Ross,Smith,Casey,&Slavin,1995).There
are some children,andin high-poverty settings
perhapsmany,whose academicproblemsarenot
redressedby ourcurrent epertoire f well-crafted
programs,and to helpthemprobablywill requireeven morefar-reaching eforms.Onesthatbreak
the strangleholdof the clock andcalendar e.g.,Cuban, 1989; Tyack & Cuban, 1995; Tyack &
Tobin, 1994) may merit special attention. TheNational EducationCommission on Time and
Learning 1994, p. 7) putsit thisway:"Decadesof schoolimprovement fforts have
founderedon a fundamentaldesignflaw,the as-
sumptionthatlearningcan be doled out by the
clock anddefinedby thecalendar ... Some stu-
dents takethreeto six timeslongerthanothersto
learnthesamething.Yet studentsarecaught n a
timetrap-processed on an assemblyline to the
minute.Ourusage of time virtuallyassures thefailureof manystudents."
The challenge-a dauntingone-is to build
more flexibility into the system and to put that
added lexibilityto gooduse. Butdespitepovertyandfamily disruption,t is importantorecognize
thatyoung children'sabilityto learnduringthe
school yearseems little impairedby scarce fam-
ily resources.Recognizing the efficacy of ele-
mentary chools nlevelingtheplaying ield s yetanother trategy orclosingthe achievementgap
between rich andpoor. Most press coverage ofAmericaneducationtoday emphasizes the sys-tem'sfailures,especiallywithrespect o themost
disadvantagedtudents.Missed in thesereports s
theextentto which schoolsalreadyhelpmakeupfordeficitsin poorchildren'sbackgrounds.
Recognitionof thepowerof schoolsto makea
differencein the lives of poor studentsneeds to
be coupled with efforts to involve parentsand
communities n the schoolingprocessso thatall
parents,notjust middle-classparents,are active
collaboratorsn the education of their children.
Thephysicalpossessionsof betteroff families-
computers,booksand the like-may be of some
importance n producing he summeradvantage,butprobablymoreimportants thatparentsview
themselves as partners n the learning processandpossessthepsychologicalresources hatsup-
port learning.Parentsalso contribute o the am-
bience of theneighborhood,
fonly by selectingthemselves ntogoodonesandavoidingbadones.
This lackofresources nfamilyandneighborhood
poses a double burden for poor children.Pre-
schoolandsummerprograms, roperly rganized,canhelptopotentiate conomicallydisadvantaged
parents nd heirneighborhoodsnsupport f chil-
dren's academicdevelopment.
Notes
This is a revisedversionof a paperpreparedor"Summer earningndthe AchievementGap:FirstNationalConference,"uly17-18,2000,Baltimore,MD,anearlier ersion f whichwaspresentedtthe1998AnnualMeeting f theAmerican ssociationorthe Advancementf Science,February2-17,Phila-
delphia, A.WethankMikeSeltzer orhelp nwork-
ing throughetails f theHLManalysis.SeealsoPhillips,Crouse, ndRalph,1998.
2Likewise,heBlack-Whiteap n achievementn-
creasesromheelementaryradeshroughigh chool
(Phillipstal.,1998).3In1996 U.S.DepartmentfEducation,999)al-
most 10%of all school-age hildren ttendedum-mer chool,ncluding.5%ofchildrennGrades -7.
Accordingo a recent urveyBorman, 001), hena-tion's 100largestschooldistrictsall offersummer
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Alexander,Entwisle,and Olson
programs.Ninety-two percentprovide remedial in-
structionduring he summer,and28% of those entail
some form of mandatoryattendance(personalcom-
munication).4 Counting"studies" s complicated n quantitative
literaturereviews. The two BSS paperscovered byCooperet al. (1996) use the same datasourceandso
constitute one "study"for their purposes, whereas
Heyns's two papersuse differentdatasourcesand so
constitute two studies. In fact, the data analyzed in
Heyns's 1987report,heSustainingEffectsStudydata,havebeenanalyzed roma seasonalperspectiveby sev-
eralresearchers e.g., Carter,1984; Ginsburg,Baker,
Sweet,&Rosenthal,1981;Klibanoff&Haggart,1981;
Bryk & Raudenbusch,1988). Cooperet. al.'s (1996)
meta-analysisuses 10 effect sizes from one of these
reports (Klibanoff & Haggart, 1981) to reflect the
SustainingEffects Studyevidence on the matter.5Karweit, Ricciuti, and Thompson (1994), also
analyzingnationaldata(i.e., theProspectsfirstgrade
cohort), find much the same duringfirst grade and
the summerbetween first and second grade. How-
ever, in second grade, school-year gains favor chil-
drenin low-poverty schools.
6 Thestudyby Phillips,Crouse,andRalph 1998) is
broader n scope, covering Black-Whitedifferences
throughGrades1 to 12, butit is synthetic, .e., draws
togetherdatafromdifferentsources.7 For these groups,datacoverage is good. In both
domains,more thanhalf havecompleteCATdata,and
justunder hreequarters73.5%on theCAT-V;73.6%
on theCAT-M)have at least 8 of the 10 scores.8 A given achievementgap,say20 points,will seem
more impressiveif scores rangeover a narrowband
(e.g., from 0 to 100) than if they rangeover a broad
band(e.g., 0 to 1000). As withtestingdatagenerally,CAT variability n the BSS increaseswith children's
age, such thata constantpoint gap implies a smallerrelative difference.9Variations of Table 2 have been reportedprevi-
ously (Alexander&Entwisle,1996a, 1996b;Entwisle,
Alexander,& Olson, 1997).Thisversionincorporatesrecentdataenhancements,one being the inclusion of
achievementdata or somechildrenwhotransferredo
schools outsidethe BCPS.
10Gains per monthare only approximate.Testingwas donein OctoberandMay,butexact dates arenot
known. The 8-monthand 4-month ntervalsusedthus
lack precision,butthe consequencesof this probablyareconservative e.g., someschool-yeargainis "cred-
ited"to the summer,so raw summergains andgains
permonthlikely err on thehigh side).
1Muchthe same is observed when the exercise is
repeatedon a full-panel (i.e., listwise-data-present)basis.
12 The only other strictly comparableanalysis of
which we areaware s didactic:BrykandRaudenbush
(1988, 1992) model seasonaleffects on achievementgrowth to illustrate within-person applications of
HLM. An unpublished aperby Karweit,Ricciuti,and
Thompson 1994)reports rowthcurveresultsoverone
summer and two wintersusing a repeated-measuresANOVAapproachhat s similar n intent.
13The specifications for the single summer-
adjustmentmodel are the same except thatonly one
summer-adjustmentarameters estimatedat Level 1.
Accordingly,at Level2, between-personffects arees-
timated or four rather han seven Level 1 parameters.14 In the Level 2 specification,the Level 1 param-
etersthatrepresent urvature rnonlinearityn therate
of achievementgains (i.e., p6i)are not allowed to varyin relationto studentSES, race, andsex. Preliminary
analysesdetectedno suchconditionalitynvolvingthe
deceleration erm.15A baseline model that fits just the grandmean
is used to partitionthe variance in test scores into
between-personand within-personcomponents.For
CAT-V,25.4%of the variance s between-person;or
CAT-M,22.6%of the variance sbetween-person.16 A 1-SD difference in family SES corresponds,
roughly,to thedifferencebetweenhaving high school
dropoutparentsandhavingparentswithsomecollege.17 By way of comparison,the actualdrop-off ob-
servedfor the firstsummer s 1.12 pointsforthe sam-
ple as a whole. The estimated effect is much larger,butthe estimate derives fromanaveragesummerad-
justmentacross all summersand so sacrifices preci-sion.
18 Recall that the summeradjustmentn the model
fromwhichtheseestimatesarederived s constrainedto be the same all four summers.That constraint s re-
laxed in Table 4.19For a generaloverview, see Barett, 1995.20 In 1991, though,4% of firstand second graders
whose parents were high school dropouts had not
attendedkindergartenversus 1%or 2% for all other
educationcategories(U.S. Departmentof Education,
1992).21 And half-day programsremained the majority
into the early 1990s (e.g., Love & Logue, 1992;U.S.
Department f Education,1992).22For a discussion of the link between organized
sportsandacademicprogress, ee Entwisle,Alexander,andOlson, 1994.
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Schools,Achievement,andInequality
APPENDIX
Seasonal AttritionChecks:Backgroundand OtherCharacteristicsrom First Grade or Cross-Sectional,
Restricted,and Full Panel Samples
Samplecharacteristics Cross-sectionalcoveragea Restrictedcoverageb Fullpanel coveragec
FamilySESlevel -.04/(787) -.05/(665) -.13/(368)Pooled SD [.80]Mother'syearsof education 11.67/(750) 11.72/(635) 11.60/(353)PooledSD [2.55]
Proportionow income .67/(701) .67/(627) .68/(366)Pooled SD [.47]
Proportionwo-parenthousehold .56/(754) .56/(637) .54/(355)PooledSD [.50]
ProportionAfrican American .55/(790) .57/(665) .62/(368)Pooled SD [.50]
Proportionemale .51/(790) .51/(665) .53/(368)
Pooled SD [.50]CATV, fall 1stgrade 280.62/(691) 280.71/(665) 280.74/(368)Pooled SD [40.81]CATM, fall 1stgrade 292.49/(708) 293.50/(653) 294.38/(362)PooledSD [31.94]Academicself-image, spring1stgrade 4.17/(717) 4.17(627) 4.20/(355)PooledSD [60]
Marks, all 1stgrade 2.06/(704) 2.07/(623) 2.12/(354)PooledSD [.71]
Absences, 1stgrade 13.28/(702) 13.23/(622) 13.15/(355)PooledSD [11.64]
Work habitratings,fall 1stgrade 10.03/(702) 10.08/(620) 10.25/(352)PooledSD [2.12]
Note. Samplesizes are shown in parentheses; tandarddeviationsare shownin brackets.
aAll possiblecases.
bSample coverageis cross-sectionalbut screened on CAT availability or fall of Grade1 and scores for at least two other time
points.Samplesare drawnseparately orverbal andquantitativedomains.Resultsreportedhereare for the verbalsample.The full panel sample screenson complete CAT coverage (5 wintersand4 summers),separatelyby verbal andquantitative
domains.Resultsreportedhereare for the verbalsample.
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Authors
KARL L. ALEXANDERis the JohnDewey Pro-
fessor of Sociology at The JohnsHopkinsUniversity,3400 N. CharlesStreet,Baltimore,MD 21218;e-mail:
[email protected] interests center on problems of
educationalstratificationhat canbe addressedvia or-
ganizational, ocial-psychological,and ife courseper-
spectives. The Beginning School Study (BSS) has
been his primaryresearchactivity since the projectcommencedin 1982. With Doris Entwisle and Susan
Dauber,he is revising andupdatinga monographongrade retention, On the Success of Failure: A Re-
assessmentof theEffectsof Retention n the PrimaryGrades(CambridgeUniversityPress, 1994). He also
is workingon severalprojectsthatexaminethe earlyadulttransition hrough he lens of theBSS; one proj-ect focuses on mode of high school exit.
DORIS R. ENTWISLE is professor emerita of
sociology at The JohnsHopkins University. She has
been interested ormanyyearsin theeffects of social
structure n humandevelopment n middle childhood
andadolescence.Her currentresearchconcernshowyouthin the BeginningSchool Studymanageto jug-
gle their work and school roles as theymake the tran-
sition to adulthood. She recently published a book
(with Karl L. Alexanderand Linda S. Olson) titled
Children,Schools,andInequality Westview-Perseus,
1997), which discusses the ways in which social and
190
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Schools,Achievement,andInequality
financialdisadvantage lters he life paths hatchildren
take through elementaryschool. A formerGuggen-heim Fellow, in 1997 she receivedthe Society of Re-
search nChildDevelopmentAward orDistinguishedScientific Contributionso ChildDevelopment.
LINDA STEFFEL OLSON is a senior researchassistant n theDepartment f Sociology at TheJohns
HopkinsUniversity.Shehasbeen associatedwith the
Beginning School Study for the past 15 years. Her
interests center on the effects of social structureon
schoolingoutcomes.
Manuscript eceivedSeptember27, 1999Revision receivedNovember3, 2000
Accepted February , 2001