This case demonstrates the efficacy of utilizing an intensive, multi-faceted behavioral intervention paradigm. A comprehensive, integrative, school-based service model was applied to address attention deficit hyperactivity disorder symptomology, oppositional behaviors, and explosive anger at the secondary level. The case reviews a multi-modal assessment approach to inform intervention, including a developmental history; parent, teacher, and student interviews; systematic classroom observations; and BASC-2 and Conners parent, teacher, and student social, emotional, and behavior rating reports. Treatment included cognitive-behavioral therapy sessions over 6 months with the implementation of a 9-week classroom Daily Behavior Report Card plan. Outcome data revealed a decrease in office discipline referrals, lower levels of behavior symptoms, and an increase in prosocial classroom behaviors with maintained improvement into the following school year.