In this project conducted from November 1974 until April 1978, each of 5 site communities was assisted in the development of a coordinated planning process which emphasized prevention of juvenile delinquency, interagency cooperation, and identification of needs and problems based on research data. Throughout its operation, the project stressed the need to initiate programs that were philosophically consistent with the National Strategy for Delinquency Prevention and Youth Development. Among the project's goals was the establishment of a data base which supported planning activities. In addition, a Model Youth Service System was developed by project personnel and implemented in the demonstration sites by the community coordinators. Key elements of the system were planning groups and sanctioning groups which established and accomplished specific objectives in the areas of family life, juvenile justice, recreation, education and youth employment. This report provides a historical perspective on the project as well as a description of national staff and coordinator activities throughout the project's operation. (Author/GC)