RecruitingBehavioural interventionPrimary Connections for Youth and FamiliesThe goal of this clinical trial is to compare a standard adolescent-only approach to substance use screening, brief intervention, and referral to treatment to a in primary care settings. Primary outcomes (AOD use, co-occurring behavior problems, parent-youth communication about AOD use) and secondary outcomes (adolescent quality of life, therapy attendance) are assessed at screen/initial and 3, 6, 9, and 12 months follow-up.