Offers CT residents, 10 weeks of virtual or in-person, free Cognitive Behavioral Therapy (CBT) for alcohol and/or other substance use (including marijuana), from occasional to chronic use. Participants in this study will receive free substance use treatment, which may cause a decrease in their current substance use, an increase in their level of social support, and an improvement in their overall well-being. Participants of any gender, ages 14-21, who have a history of substance and/or alcohol problems and are not currently in treatment for alcohol and/or substance use. Participants will be compensated up to $250 with gift cards for participating in research interviews over the course of a year.