This 90-minute virtual webinar introduces adolescent service providers to essential concepts and practical tools for addressing unhealthy alcohol, opioid, and drug use among youth. Designed for professionals in school-based health centers and youth-serving organizations, the session blends foundational knowledge with real-world applications. Participants will explore the spectrum of substance use in adolescents, age-appropriate screening tools, and evidence-based prevention and intervention strategies. The webinar also addresses stigma, developmental considerations, and opportunities to support youth through early identification and responsive care.