The Provider's Guide (Criminal Conduct and Substance Abuse Treatment for Adolescents) identifies psychological, biological, and social factors that contribute to the onset of adolescent deviance, including substance abuse, delinquency, and crime. Causal models for these problem behaviors are described, followed by a review of assessment and treatment protocols widely used in contemporary practice. Guidelines are provided for delivery of the 32- session PSD-C treatment curriculum, specifically designed for adolescents who manifest co-existing juvenile justice and substance abuse problems. The PSD-C Provider's Guide explains how effective adolescent treatment derives from integration of the following evidence-based strategies: motivational enhancement; stages of change; gender and diversity proficiency; cognitive-behavioral skill development; relapse and recidivism prevention; differential assessment; and individualized treatment planning. The Provider's Guide delineates principles for effective adolescent-focused treatment in tandem with the Participant's Workbook: Pathways to Self-Discovery and Change (PSD-C).