Does Detracking Work? Evidence from a Mathematics Curricular ...

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Detracking 1Table 4: Segregation in 8 th grade mathematics classrooms, 2004-2005 to 2007-2008 (index of dissimilarity)Gender2004-2005 2005-2006 2006-2007 2007-2008Male/Female 0.25 0.21 0.23 0.24EthnicityHispanic/VietnameseHispanic/non-HispanicLanguage StatusELL/Fluent English7 th Grade Mathematics Test ScoreTop 25%/Bottom 25%Top 50%/Bottom 50%7 th Grade ELA Test ScoreTop 25%/Bottom 25%Top 50%/Bottom 50%N(Classrooms)0.58 0.57 0.55 0.580.48 0.48 0.48 0.510.46 0.45 0.48 0.450.92 0.93 0.81 0.790.68 0.71 0.59 0.520.81 0.78 0.74 0.770.57 0.55 0.51 0.52256 204 213 241
Detracking 2Table 5: Peer quality and skill heterogeneity 8 th grade math classrooms2004-2005 2005-2006 2006-2007 2007-2008Peer quality (Classroom mean, 7 th grade math percentile)General Math 32.14 30.29 23.84 19.66Algebra 72.20 69.35 57.31 51.87Geometry 93.09 88.52 87.76 77.76All courses 46.90 50.63 52.18 50.58Low-performing peers (% of classroom below basic on 7 th grade math)General Math 42.11 45.35 55.48 67.38Algebra 0.87 1.55 11.34 15.28Geometry 0.00 0.00 0.00 1.15All courses 26.39 22.39 20.27 20.67Skill heterogeneity (Classroom IQR, 7 th grade math percentile)General Math 22.68 23.76 18.20 18.68Algebra 23.45 24.01 31.02 29.54Geometry 7.15 14.12 13.26 25.5All courses 22.36 23.05 25.79 27.37
Page 4 and 5: Detracking 3Warning of a “rising
Page 6 and 7: Detracking 52005 school year, the d
Page 8: Detracking 7placements have positiv
Page 11 and 12: Detracking 10teacher professional d
Page 13 and 14: Detracking 12exert a positive effec
Page 15 and 16: Detracking 14Towering Pines in the
Page 17 and 18: Detracking 16have not demonstrated
Page 19 and 20: Detracking 18ordered logistic regre
Page 21 and 22: Detracking 20provides a better metr
Page 23 and 24: Detracking 22reported in Table 1, w
Page 25 and 26: Detracking 24look at the extent of
Page 27 and 28: Detracking 26The third panel of Tab
Page 29 and 30: Detracking 28over the study period.
Page 31 and 32: Detracking 30below basic in 7 th gr
Page 33 and 34: Detracking 32Towering Pines’ expe
Page 35 and 36: Detracking 34population they did. H
Page 37 and 38: Detracking 36ReferencesAuthors. 200
Page 39 and 40: Detracking 38Loveless, T. (1999). T
Page 41 and 42: Detracking 40Table 1: Descriptive s
Page 43: Detracking 1Table 3: 10 th grade ma
Page 47: Detracking 4Figure 1: Quantile regr

Does Detracking Work? Evidence from a Mathematics Curricular ...

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