Children's externalizing and off-task behaviors are deemed a major concern for elementary teachers and interfere with the classroom learning environment (Abidin & Robinson, 2002; Shillingford-Butler & Theodore, 2013). Children with these behaviors are at risk of falling behind academically and experiencing ongoing behavioral problems throughout their development. This single-case research design investigates the effectiveness of Adlerian play therapy on the behaviors of two elementary-aged children who have externalizing and off-task classroom behaviors. Results for this intervention suggest Adlerian play therapy may show promise as an effective intervention for school counselors and school-based counselors.