This volume explores serious challenging behavior in schools, with an emphasis on promising and research-based approaches to dealing with such behavior. Topics include what we know about: (1) the nature and extent of the problem (e.g., rates of aggression, violence, and noncompliance in schools); (2) addressing extreme forms of noncompliance; (3) dealing with serious disruptive behavior; (4) violence prevention programs; (5) schoolwide response to aggression and violence; (6) issues of covert antisocial behavior (e.g., vandalism, truancy, theft); (7) functional behavioral assessment and function-based interventions; (8) legal and policy considerations in disciplining students with disabilities; and (9) promising and needed avenues for further research.