The Positive Youth Development Program (Caplan et al., 1992; Weissberg, Barton, & Shriver, 1997) focuses on general social competence promotion and substance use prevention. In the experimental evaluation of the program, classes of middle school students (n=282 youth) were randomly assigned to either a treatment or control group. The treatment group received curriculum that covered stress management, self-esteem enhancement, problem-solving, health information, assertiveness, and the use of social support networks. At the end of the program, youth in the treatment group had better coping, stress management, problem-solving, and teacher-rated conflict resolution skills than the control group youth.