School-based substance abuse prevention strategies are presented in this guidebook that stresses nonclassroom programs. It includes information on the importance of expanding school-based prevention plans, an overview of goal and implementation strategies, and a description of specific prevention strategies. These stages include awareness and information campaigns, afterschool programs, peer helper programs, teen conferences and institutions, support groups, performing arts groups, role model and mentor programs, substance-free student events, prevention clubs, service projects, and environmental change projects. The school's expanded role involves helping students to develop personal and social competencies, initiating change in norms that support substance use, and promoting change through student and community channels. (12 references) (LMI)