Two variations of school-based cognitive-behavioral training (CBT) program were compared to each other and to a waiting-list control condition in the treatment of children with attention-deficit hyperactivity disorder (ADHD). The experimental interventions included a multicomponent condition that provided coordinated training programs for parents, teachers, and children and a teacher-only condition that offered training for classroom teachers only. Evaluation of outcome occurred at pre-intervention, post-intervention and at 6-week followup periods. Depedent measures included classroom behavior observations, teacher ratings of child behavior, child self-report, and teacher ratings of adjustment. The multicomponent CBT condition was significantly better than the other conditions at improving observed off-task/disruptive behavior at post-test. This improvement was maintained at followup, although treatment condition differences were no longer significant. There were no treatment condition differences on any other measures at post-intervention or followup. It was concluded that the intervention had minimal short-term effects on the ADHD children. The results are discussed within the context of several methodological limitations of the study which serve as proposals for continued research in this area.