This report covers four major aspects of the declining enrollment problem in Ontario, Canada, schools. Chapter 1 reviews the literature on the advantages and disadvantages of small high schools, including suggestions for operating small secondary schools effectively. Chapter 2 contains the results of an opinion survey of teachers, principals, and supervisory officers concerning the minimum acceptable size of elementary schools. This survey also gathered opinions on ways of maintaining quality education in smaller schools. Chapter 3 examines the financial implications of reducing school size, focusing on per pupil expenditure. Chapter 4 reports the results of 29 case studies on schools that have developed one or more alternative daytime uses for vacant school space. This report is a sequel to a 1975 report on declining enrollment, which focused on school closing. (Author/DS)