This study examined the effectiveness of social learning (SL) or structural developmental (SD) teaching strategies on the moral development of elementary-age students. Participants were 204 physical education students in Grades 4,5, and 6; three classrooms in each grade were randomly assigned to control, SL, or SD groups. Self-report measures assessed moral judgment, reason, and intention; teachers rated prosocial behavior. By mid- and postintervention class-level analyses, the SL and SD groups scored significantly higher than the control on moral judgment and/or intention; by postintervention, the SD group was significantly higher on moral reason. Mid- and postintervention student-level analyses showed that the SL and SD groups scored significantly higher on moral judgment, intention, and behavior; the SD group was significantly higher on moral reason. These results provide support for the effectiveness of both social learning and structural-developmental teaching strategies on the moral development of children in physical education.