Although the need for early intervention for mental health difficulties is widely acknowledged, few studies have attempted to explicitly increase actual help seeking behavior for mental health difficulties. Students in intervention classrooms received two one-hour, in-class workshops on distress and help seeking and were compared to students in non-intervention classrooms in a 2-level hierarchical model. More frequent help seeking behavior and more mental health referrals were observed among students in the intervention group than among students in the comparison group. Effects were moderated by the level of distress experienced by students, but not by help seeking attitudes, and could not be accounted for by school staff referrals or website utilization. Results showed that help seeking behavior for mental health difficulties and mental health referrals can be increased with only a moderate investment in time, but that benefits of school-based intervention may be greatest among students with specific needs, such as high levels of distress.