The study was a pilot evaluation of a new prevention program for boys in middle school in the United States. Findings suggest that the program improved attitudes related to use of coercion and violence in relationships. All boys improved on measures of gender equality in relationships and perceptions of male power. Findings also revealed that while the program is designed for universal or primary violence prevention, many boys reported being the victim of peer bullying and harassment prior to being part of this program. The program's focus on healthy masculinity may serve both a primary and secondary prevention function for middle school boys.