Good Behavior Game (GBG) is a classroom-based behavior management strategy for elementary school that teachers use along with a school’s standard instructional curricula. GBG uses a classroom-wide game format with teams and rewards to socialize children to the role of student and reduce aggressive, disruptive classroom behavior, which is a risk factor for adolescent and adult illicit drug abuse, alcohol abuse, cigarette smoking, antisocial personality disorder (ASPD), and violent and criminal behavior. GBG is structured around four core elements: classroom rules, team membership, self- and team-behavior monitoring, and positive reinforcement of individual team members and the team as a whole.