The aims of the proposed 5-year study are threefold: (1) To examine the effectiveness of a computer-facilitated Screening and Brief Advice (cSBA) to reduce initiation and substance abuse among adolescents in a novel setting; (2) To examine the comparative effectiveness of adding a Brief Intervention and Referral to Treatment component to the cSBA intervention among adolescents in these centers; (3) To examine factors facilitating and inhibiting the implementation of SBIRT-type procedures with adolescents in FQHCs.