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Aims  The goal of this group‐randomized trial was to test the effectiveness of an adapted alcohol use preventive intervention for urban, low‐income and multi‐ethnic settings.

Design and setting  Sixty‐one public schools in Chicago were recruited to participate, were grouped into neighborhood study units and assigned randomly to intervention or ‘delayed program’ control condition.

Participants  The study sample (n = 5812 students) was primarily African American, Hispanic and low‐income.

Intervention  Students, beginning in sixth grade (age 12 years), received 3 years of intervention strategies (curricula, family interventions, youth‐led community service projects, community organizing).

Measurements  Students participated in yearly classroom‐based surveys to measure their alcohol use and related risk and protective factors. Additional evaluation components included a parent survey, a community …