This study examined the predictive association between gender, ethnicity, and homework parental involvement, self-regulated learning processes, and motivational beliefs among 10th grade high school students. It was predicted that students' motivational beliefs and self-regulatory processes would be significant predictors of students' math academic achievement beyond and above homework parental involvement, gender, and ethnicity of the students. A regression analysis revealed that motivational beliefs and use of self-regulated learning strategies are significant predictors of math standardized test scores beyond and above parental active and reactive homework involvement and the students' gender and ethnic differences. Students who engage in self-regulation are better able to perform on the math standardized test. Implications for instruction are also discussed. (Contains 3 tables.)