The Early Risers prevention program aims to alter the developmental trajectory of children with early onset aggressive behavior. The program features 4 CORE components: (a) an annual 6-week summer school program, (b) a teacher consultation and student mentoring program, (c) child social skills groups, and (d) parent education and skills-training groups, all delivered in tandem with a FLEX family support program individually tailored to address the unique needs of families. At baseline, the mean age of the sample was 6.6 years. Following 2 years of intervention, program children showed significant improvement relative to controls in academic achievement and school behaviors. Change on behavioral self-regulation was moderated by level of child aggression, with intervention effects found for only the most severely aggressive children. Parents with high program attendance rates showed improvement in discipline methods.