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. Author manuscript; available in PMC: 2013 Apr 1.
Published in final edited form as: J Exp Child Psychol. 2012 Jan 3;111(4):607–628. doi: 10.1016/j.jecp.2011.12.001

Table 3.

Demographic Information

WP
(teachers, n = 12)
(students, n = 169)
CAL
(teachers, n = 11)
students,n = 155
control
(teachers, n = 8)
(students, n = 118)
Variable % (n) M (SD) % (n) M (SD) % (n) M (SD) χ2 p F p



Teachers
   Male 0 (0) 0.0 (0) 0.0 (0)
   Race 2.27 0.32
     African American 25.5 (3) 18.2 (2) 0.0 (0)
     Caucasian 75 (9) 81.8 (9) 100.0 (8)
   Years Teaching 11.00 (9.42) 20.27 (10.24) 20.63 (10.54) 3.26 0.05
Students
   Male 50.3 (85) 43.2 (67) 47.5 (56) 1.78 0.41
   Race 2.61 0.96
     African American 33.9 (57) 36.1 (56) 32.2 (38)
     Caucasian 37.5 (63) 34.9 (54) 38.1 (45)
     Asian 4.8 (8) 3.2 (5) 5.9 (7)
     Hispanic 17.9 (30) 19.4 (30) 15.2 (18)
     Other 5.9 (10) 6.4 (10) 7.6 (9)
   Subsidized Lunch 75.1 (127) 82.6 (128) 76.3 (90) 2.53 0.28
   Retained 6.5 (11) 7.1 (11) 10.2 (12) 1.46 0.48
Measures to asses comparability
     *Addition Fact Fluency 9.54 (4.91) 9.85 (5.18) 9.31 (4.88) 0.40 0.67
     *Single-Digit Story Problems 8.11 (4.11) 8.03 (3.76) 7.52 (3.61) 0.91 0.40
     Vanderbilt Story Problems 9.49 (6.03) 9.89 (5.39) 8.66 (5.30) 1.63 0.20
  Math Status 1.31 0.97
    Low in word problems 20.7 (35) 20.0 (31) 22.0 (26)
    Low in calculations 11.8 (20) 10.3 (16) 11.9 (14)
    Low in both 18.9 (32) 17.4 (27) 20.3 (24)

Note

*

These measures were also used to screen at-risk status.