Children who are off-task in schools struggle with completing their work and engage in disruptive behaviors. Without intervention, these behaviors tend to worsen, putting them at risk for more serious, ongoing problems throughout life. Group counseling provides opportunities for people to practice socially useful behaviors. Using a single case design, we investigated the effectiveness of Adlerian group play therapy with children identified by teachers as having problematic classroom behaviors. Results suggest that students' on-task behaviors improve during the Adlerian group play therapy intervention. The results revealed mixed findings for the follow-up period.