Teen Intervene is an early intervention program for 12 to 19-year-olds who are showing the early stages of alcohol or substance use problems (e.g., using or possessing substances during school) but DO NOT use these substances daily or demonstrate substance dependence. The program consists of two-to-three one hour long sessions that are individualized to the specific needs of each teen. Each session focuses on positive behavior change, harm reduction, and ultimately, abstinence from substance use. Teen Intervene has a grounding in stages of change theory, cognitive-behavioral therapy, and motivational interviewing.