This online training provides general information about addiction, the impact of substance use on the brain and adolescent development and also introduces drug classifications and types. Participants will further explore the effects and trends of the most widely used substances by teens - alcohol, tobacco and marijuana. 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 also includes information and resources for IDHS SAPP providers to make referrals for early intervention or treatment services as well as strategies for applying this information to their work. Participants will obtain additional resources to learn more about ATOD effects and trends.