Data for use in the development of sound public policies for financing education in the United States are provided. Chapter I deals with enrollment trends relating to urban public and nonpublic schools with a discussion of demographically related elements such as housing, migration, and race. Enrollment data is broken down by years, sponsors, grade divisions, and race. Educational trends that affect school enrollments are discussed such as the decline of religious teachers in Catholic schools, and rising costs in public and nonpublic schools. In Chapter II, the capacity of the Chicago, Detroit, and Milwaukee school systems to absorb additional students without new school construction is shown to vary substantially, depending on the nature of the standards that are used to define an acceptable student teacher classroom ratio. Chapter III estimates the current economic value of nonpublic school operations in Chicago, Detroit, and Milwaukee, based on 1970-71 cost data for capital outlay and operations. Chapter IV deals with public and nonpublic schools in Philadelphia concerning enrollment trends, building capacity, and financial impact of declining nonpublic school enrollment. Chapter V summarizes highlights of the study report. (For related document, see ED 058 473.) (Author)