Adolescent substance use treatment programs need group curricula designed specifically for teenagers. Most clinical manuals were written for adults and assume cognitive capacities, life experiences, and motivational frameworks that do not match how adolescents think, feel, or relate to authority. Counselors spend hours each week adapting adult materials for teen groups, producing inconsistent sessions and accelerating facilitator burnout. School counselors and prevention coordinators have even fewer options, with no structured group curriculum available for the indicated intervention level where students have been identified as at-risk but do not yet need clinical IOP placement. A Complete 24-Session Group Curriculum Built for Teens This facilitator's guide provides 24 fully structured group sessions organized across three treatment phases. Phase 1 (Sessions 1 through 8) builds engagement, awareness, and motivation using motivational interviewing techniques that respect adolescent autonomy. Phase 2 (Sessions 9 through 16) develops concrete skills in emotion regulation, distress tolerance, communication, anger management, and coping. Phase 3 (Sessions 17 through 24) integrates skills into personalized relapse prevention plans, recovery capital building, and continuing care preparation. Every session includes timed facilitation scripts for 60, 75, and 90 minute formats, psychoeducation content written at adolescent reading levels, experiential activities, group processing prompts, and reproducible worksheets. Five Evidence-Based Frameworks in One Unified Program The curriculum integrates motivational interviewing, cognitive behavioral therapy, dialectical behavior therapy skills, acceptance and commitment therapy elements, and harm reduction principles into a single, sequenced treatment arc. Each framework appears where research supports its greatest effectiveness with adolescent populations. Facilitators deliver one coherent program rather than piecing together content from five separate manuals. Designed for Both Clinical and School Settings Implementation guides cover adolescent IOP and PHP integration, school-based delivery within MTSS frameworks (Tiers 1, 2, and 3), open-enrollment management for rolling admission programs, and session adaptation for 45-minute school periods. Separate adaptation chapters address LGBTQ+ youth, justice-involved teens, trauma-exposed youth, neurodivergent adolescents, and racially and ethnically diverse populations. Four multifamily group sessions provide a structured family engagement component. Ready-to-Use Clinical Tools Included Supplementary materials include 24 reproducible session worksheets, facilitator quick-reference cards, group intake and screening templates, informed consent and assent forms for clinical and school settings, treatment progress note templates aligned with insurance documentation requirements, outcome measurement protocols, a crisis safety plan template, and wallet-sized Help Cards. Annotated session transcript excerpts demonstrate MI techniques in action with teens, and a facilitator self-assessment tool supports ongoing professional development. Addiction counselors, school counselors, licensed professional counselors, social workers, prevention coordinators, and program directors working with adolescents ages 12 to 18 will find a curriculum that reduces preparation time, standardizes group delivery, and meets the developmental needs of the teen population that existing adult-focused resources consistently fail to serve.