The purpose of this project is to determine in-school and out-of-school outcomes for high school students who participated in a cluster (CRCT) of the efficacy of a comprehensive treatment program developed by the Center on Secondary Education for Students with Autism Spectrum Disorder (CSESA). The CSESA program was a comprehensive treatment model that was implemented in 30 high schools over a two-year period. School based teams received training and ongoing coaching in the use of individualized assessments, goal writing, and the implementation of various interventions and evidence-based practices based on student needs and goals to improve both student outcomes and school program quality. Intervention features focused on academics, independence, social competence, and transition/family.