This study assessed the impact of a school-based group intervention, "The Council for Boys and Young Men," specifically designed for adolescent males. The participants who attended an alternative school in a metropolitan area were randomly assigned to the intervention or to waitlist control groups. Measures assessed self-esteem, future and school-related self-efficacy, masculine identity ideology, identity distress, and relational aggression. Participants in "The Council" intervention group showed significant increases in school and future self-efficacy from pre- to post-test. For all boys at pre-test, higher scores on stereotypical masculine ideology were related to more relational aggression and lower self-esteem.