Research on variables that predict disproportionate representation of minority students in special education has often ignored an important variable -- academic achievement. This study examined the prediction of representation of students from various minority racial/ethnic groups using district-level academic, demographic, and economic blocks of variables. The relative strength of these blocks was tested using weighted multiple least squares regression. The results show that academic achievement added significantly to predictive models for various racial/ethnic groups and disability categories. Implications and directions for future research are also discussed.