a primary diagnosis of ADHD-I, as confirmed by the Kiddie Schedule for Affective Disorders and Schizophrenia (KSADS-PL), (2) aged 7–11, (3) child IQ ≥ 80, (4) living with at least one parent for the past year, (5) attending school full time in a regular classroom, (6) availability to participate in treatment groups, (7) school proximity within 45 min of the study site, (8) teacher consent to participate in school based treatment, and (9) no evidence of pervasive developmental disorders or other neurological illnesses