Parent Management Trainingï¿½Oregon Model (PMTO) is an evidence-based intervention that prevents and treats child and adolescent behavior problems by teaching parents strategies that reduce coercion and increase positive parenting practices (Forgatch & Patterson, 2010; Patterson, 2005). The intervention, which was developed by the group of colleagues led by Gerald Patterson, has emerged over several decades with a programmatic focus on families with youngsters with externalizing problems such as aggression, antisocial behavior, and delinquency. PMTO's staying power over nearly five decades is likely tied to the continuing integration of theory, science, and practice with a focus on improving outcomes at every level. In the last fifteen years, PMTO has been implemented internationally. Reliable and valid data using multiple method and agent assessment from U.S. and international PMTO implementations illustrate the challenges of making empirically-supported interventions routine practice in the community. Technological advances that break down barriers to communication across distances, the availability of efficacious programs suitable for implementation, and the urgent need for high quality mental health care provide strong rationales for prioritizing implementation. The next challenge is to reduce the prevalence of children's psychopathology by creating science-based delivery systems to reach families in need, everywhere.