Child and adolescent participants and their parents will complete assessments at baseline, midpoint in treatment, post-treatment (Week 12 or 14), and 3- and 12-month follow-ups. Participants assigned to the wait list condition will complete assessments only at baseline, before entering treatment (Week 12 or 14), and after completing treatment. Assessments will involve questionnaires about social and emotional functioning, interviews with study researchers, and surveys on satisfaction with the study. The child or adolescent's primary teacher will also complete questionnaires about the child.