In 2003, The Wallace Foundation began an initiative that eventually included five cities -- Boston, Chicago, New York City, Providence and Washington, D.C. -- to help them develop afterschool systems. At the time, a few cities and organizations were pioneering this approach (L.A.'s Best in Los Angeles, The After-School Corporation in New York, After School Matters in Chicago), but it was still a novelty. Five years later, Wallace examines lessons learned from this initiative, which posited two central premises: Children and teens can gain learning and developmental benefits by frequent participation in high-quality afterschool programs.A coordinated approach can increase access to, and improve the quality of, afterschool programs