This article describes the methodology and program effects of a multicomponent model of interventions designed to prevent antisocial behaviour in secondary school students. Interventions included cooperative learning, classroom management, and peer tutoring, mentoring, and mediation. Data from the Secondary Schools Demonstration Project (SSDP)…

This article describes the methodology and program effects of the Secondary Schools Demonstration Project (SSDP) conducted in four Ontario schools. The objective of the study was to evaluate the extent to which a universal program model of three interventions--cooperative learning; classroom management; and peer-helping approaches that included…