This study is one of a series initiated by the Organisation for Economic Cooperation and Development (OECD) in Paris. The series includes 21 case studies of innovative educational institutions in seven different countries for the purpose of exploring the ways in which these institutions execute the planning, implementation, and evaluation of innovations. This study describes the objectives of the York County board and shows how the structural organization of the York County Educational System is conducive to innovation. Three specific innovations are singled out for particular attention: The curriculum committees, the master teacher program, and the Organization Development Unit. Also included are an evaluation made by the people in the system of the innovative efforts of the board and an interpretation of the findings. (Author)