This online training provides general information about substance use disorder and the impact of substance use on the brain and adolescent development. The training introduces drug classifications and types. Participants will further explore the effects and trends of the most widely used substances by teens - alcohol, tobacco, marijuana and prescription drugs. Participants will learn about the effects of each drug on the brain and body, signs and symptoms of use and state and national rates and trends of use. The training includes information and resources for IDHS SUPP providers to make referrals for early intervention or treatment services. It also provides strategies for applying this information to their work. Participants will obtain additional resources to learn more about the effects and trends of alcohol and other drugs (AOD).