The Theater Troupe/Peer Education Project (TTPEP) aims to prevent substance use and other unhealthy behaviors among school-aged youth through peer education. Participants, usually youth of middle school age, are presented with an interactive theatrical performance, followed by two workshops. The performance is conducted by a troupe of high school students who have been recruited and trained in the areas of theater, health, and peer education. The aim of the performance is to increase the audience members’ knowledge of social norms; modify their attitudes, beliefs, and intentions about substance use; and provide them with peer refusal skills. The performance begins with a skit in which troupe members act out situations involving peer pressure, social acceptance, and substance use, as well as responses to these situations. Troupe members remain in character for a question-and-answer session with the audience to discuss their characters’ histories and portrayals of the various situations in the skit. In the final component of the performance, the troupe members, now out of character, facilitate a peer discussion on the issues. At the end of the performance, audience members receive information about substances, including the prevalence of use by school-aged youth.