This report describes an intervention program for improving social skills. The targeted population comprised a kindergarten, second grade, second grade physical education, and trainable mentally handicapped primary aged classes. All sites were located within 60 miles of a major metropolitan area. The lack of social skill development was documented through teacher surveys, social worker surveys, student behavior checklists, and anecdotal records. Analysis of probable cause data indicates home, school, and society all play a role in the existing problem. Intervention strategies developed after reviewing solution strategies suggested in research for improving social skills and analyzing the problem setting. Cultivating a positive classroom environment, direct instruction of social skills, and cooperative learning activities are implemented to improve the positive behavior and prosocial classroom environment. Postintervention data shows that students demonstrated an improvement in their prosocial behavior. Appendix A is the Teacher Survey; Appendix B is the Social Worker Survey; Appendix C is the Student Behavior Checklist; and Appendix D is Literature Selections. (Contains 6 tables, 2 figures, and 27 references.) (Author/MKA)