RecruitingBehavioural interventionTrain Your Brain 2.0 - Improving Memory and Decision Making Among YouthThe goal of this clinical trial is to deliver a computer-based working memory training program to improve delay discounting (DD) and prevent substance misuse among at-risk adolescents in a traditionally underserved area. Results from the study will inform future substance use prevention efforts targeted at youth exposed to adverse childhood experiences. Findings will also refine future models of intervention delivery in traditionally underserved communities. The main aims of the project are are: 1\) To examine to examine changes in hypothesized mechanisms of substance use initiation and escalation, and 2) to assess whether changes in DD are a mechanism for reducing substance misuse during early adolescence. The investigators will evaluate whether changes in DD following active treatment predict substance use outcomes over the three-month follow-up period.