“At the heart of the Models for Change story in Pennsylvania is the partnership between the John D. and Catherine T. MacArthur Foundation and the Juvenile Justice and Delinquency Prevention Committee (JJDPC), Pennsylvania's state advisory group (SAG). This monograph highlights some of the ways that Pennsylvania's SAG combined people, vision and dollars with those of Models for Change. It shows how the Foundation identified and collaborated with a key state agency to improve Pennsylvania's juvenile justice system. The JJDPC and Models for Change supported many separate lanes on the highway of reform, but some of those lanes merged to create a smoother, faster pathway to common goals.” This publication is composed of five chapters: introduction—setting the stage; Pennsylvania’s juvenile justice system; the partnership targets reform; reflections on the JJDP-MacArthur partnership; and conclusion—a partnership creates the future. Appendixes include: Mental Health/Juvenile Justice Joint Policy Statement; and a sample request for proposal (RFP)—aftercare pilot counties entitled “Development of Comprehensive Model Aftercare Approaches”.