messaging that substance use is potentially harmful, and helping the child spend time with peers who do not use substances can offset the original risk.84,85 In addition, prevention interventions that are universal (e.g., target populations regardless of risk or use status) can reduce prescription drug misuse and have positive effects on other health risk behaviors, including misuse of prescription drugs to include opioid medications. 86,87 When interventions are appropriately matched to address identified problems, they can reduce substance use, reduce the impact of ACEs, and counter the potential impact of SDOH.88,89,90 Prevention is not only effective, it is also cost effective approach to prevent later SUD have been identified as an underutilized response to the opioid crisis.91 The 2016 Surgeon General’s Report on Alcohol, Drugs, and Health92 also noted that prevention science demonstrates that effective prevention interventions exist, can markedly reduce substance use, and evidence-based programs and policies are underutilized. There are multiple examples of cost effective prevention programs. For example, the average effective school-based prevention program is estimated to save $18 per dollar invested.93 There are also cost-benefit assessments of individual programs. Too Good for Drugs, a school-based prevention program for students in kindergarten through 12th grade, was designed to increase social competencies (e.g., develop protective factors) and diminish risk factors associated with alcohol, tobacco, and other drug use. It has a benefit-to-cost ratio of + $8.74 and it is estimated that there is a 94-percent chance that benefits will exceed costs.94 Other effective and cost-effective programs include Botvin Life Skills95 which has benefit-to-cost ratio of $13.49, and the Good Behavior Game with a benefit-to-cost ratio of $62.80.96 Implementing evidence-based policies, environmental strategies, and programs requires an understanding of a community’s challenges and knowing which strategies will effectively address a community’s specific challenges. There are three approaches that help communities identify their local substance use problems, identify the appropriate evidence-based interventions to address their unique local conditions, and assess the effectiveness of the intervention. These three approaches are Drug-Free Communities (DFC) Support Program, Promoting School University Community Partnerships to Enhance Resilience (PROSPER), and Communities that Care (CTC).97,98,99,100,101 All three of these approaches have demonstrated the ability to reduce substance use among youth years after the initial intervention. Prevention works best when there is an infrastructure to support it, for example, approaches used by DFC, CTC, PROSPER and the presence of community norms that create an environment that support youth and allows them to thrive. Interventions should cross stages of child development and levels of prevention (e.g., universal, selective, indicated). Addressing substance use should parallel approaches as seen in treating other health conditions such as cancer or heart disease. To effect lasting change there should be support for a wide range of efforts—from promoting a « « « « « « NATIONAL DRUG CONTROL STRATEGY 21 healthier environment, healthier living patterns, to population screening, to identifying individuals at risk or with early/treatable disease, as well as those requiring more intensive treatment, recovery support, and rescue approaches. Recognizing that preventing or delaying initiation of substance use can confer important health and social benefits, the Biden-Harris Administration is focused on addressing the social factors that put some youth at increased risk for substance use, preventing use before it starts, and avoiding the escalation of use during the most critical period for substance use initiation. The following principles identify specific prevention interventions that can effectively address youth substance use. Principle 1: Preventing Substance Use Among School-Aged Children is Effective Delaying the age of initiation for substance use, providing skills for children that build resilience, and addressing co-occurring substance use and mental health disorders are necessary to successfully improve overall health and social outcomes for school-aged children.102 Investments in research have identified effective strategies to strengthen the mental and emotional development of young people to prevent initial use. Ensuring that school-aged children have access to universal prevention programs designed to prevent use before it starts, prevention services that focus on children at higher risk for use or those that have started using drugs, and when necessary provide referral to treatment and recovery support is essential to support the health, well-being, and futures of the Nation’s 74 million children. A. Provide technical assistance and guidance to help K-12 schools increase the reach of and access to substance use prevention supports and services. (Agencies Involved: DOJ/ OJP; ED; HHS/CDC, HRSA, NIH, SAMHSA) Schools are uniquely positioned to provide services that promote student health and optimal wellness as well as decrease barriers to learning. A number of school systems are already working to build systems that can help prevent