Table 3.

Regression Analyses Predicting Applied Problems Scores (N = 92).

Variable	B	SE(B)	t-value	${\overline{R}}^2$	Δ ${\overline{R}}^2$
Block 1
Age in Months	−0.01	0.31	−0.04	0.45
Nonverbal IQ	1.05	0.39	2.67**
Verbal IQ	1.52	0.71	2.15*
Experimental Condition 1	−6.04	2.97	−2.03*
Experimental Condition 2	−4.17	2.99	−1.39
SES Composite	4.55	1.66	2.74*
Block 2
Age in Months	−0.51	0.28	−1.79	0.57	0.12**
Nonverbal IQ	0.82	0.32	2.57*
Verbal IQ	0.99	0.47	2.11*
Experimental Condition 1a	−5.02	2.78	−1.81
Experimental Condition 2b	−2.39	2.57	−0.93
SES Composite	3.13	1.64	1.91
EF Composite	6.21	1.59	3.90**

Note. Standard errors are clustered at the school site level.

^aDummy variable for random assignment to direct instruction learning condition in larger experiment.

^bDummy variable for random assignment to discovery-based instructional sessions. Control condition is the reference group.

^*p < .05

^**p < .01.