Surplus school spaces, highlighted by falling enrollments, will significantly affect educational building policies in the eighties. Accordingly, this document consists of a comprehensive analysis of the causes of surplus, the problems and opportunities that follow, and the implications for policy and planning. Part 1 analyzes the six major causes of surplus school accommodation in highly industrialized countries: declining birth rates, planning faults, population movements, the aging cycle of the population, educational reorganization, and municipal reforms. Part 2 concerns assessment of surplus and needs, while part 3 is an indepth consideration of ways to make use of surplus space. Part 4 covers management of surplus, including participants and modes of cooperation along with obstacles and constraints. Part 5 addresses consequences for the future, in both planning and design. Finally, part 6 is a summary of conclusions pertaining to the following areas: school population change; capacity and potential of building stock; actual, potential, and future needs of the community; participation in decision-making and incentives; financial procedures, norms, and regulations; and roles and attitudes. Six case studies are appended that provide examples and ideas for the reuse of surplus space in schools: Ontario, Canada; Arlington Heights, Illinois (United States); Solleftea, Sweden; Inner London, United Kingdom; Coventry, United Kingdom; and Wales, United Kingdom. (TE)