60 pages. Evidence-Based Resource Guide Series. Includes bibliography. By engaging community members, prevention systems learn firsthand from individuals and community systems about substance use problems and social determinants that influence behavioral health. Community engagement brings together the skills, knowledge, and experiences of diverse groups to create and/or implement solutions that work for all members of the community. This guide focuses on how community engagement can play a critical role in the equitable scale-up of evidence-based programs and policies within the substance use prevention system.