Table 3. Predicting Academic Achievement from Social Behavior and Approaches to Learning.

Predictors	B	SEB	β	R²	ΔR²
Step 1				.41	.41^***
Child Sex	-.14	.06	-.10^*
Block Design	.05	.01	.22^***
Voacabulary	.03	.002	.56^***
Step 2				.46	.05^***
Class Participation	.20	.06	.25^***
Prosocial Behavior	.08	.06	.10
Aggressive-Oppositional	.15	.05	.18^**
Step 3				.48	.02^**
Sex by Participation	.07	.10	.07
Sex by Prosocial	-.31	.11	-.31^**
Sex by Aggressive	-.12	.08	-.12

Note: F (3,339) = 78.78 for step 1, F (3,336) = 10.67 for step 2, F (3,333) = 3.94 for step 3.

p < .05.

^**

p < .01.

^***

p < .001.