This study is the first follow-up assessment of the RETHINK Parenting and Anger Management Program. Parent participants (N = 168) reduced their anger, violence, and family conflict levels from posttest to follow-up, on average, at 2.5 months on 13 of 15 dependent variables. Current findings are consistent with a small, albeit growing body of literature supporting the efficacy of RETHINK in improving anger management and parenting skills. When mothers and fathers participate in 6 or 7 weekly RETHINK sessions, they appear to learn the verbal reasoning skills they need to lower their anger, conflict, and violence levels and the changes persist for at least 2.5 months.