Research indicates that 73 percent of the Nation's schools experience a major crime every 5 months, and 50 percent had more than one in a semester. Approaches for treating aggressive behavior, based on contingency management and self-management perspectives of aggression, are discussed. Treatment approaches include reinforcement, ignoring, response cost, time out, peer procedures, aversion consequences, social skills, problemsolving and stress-inoculation training. Research representing each type of intervention strategy is identified. It is suggested that preventive measures for anticipating aggressive behavior be considered. 45 references.