Declining enrollment, collective bargaining agreements, and government requirements will reduce educational opportunities in Ontario's secondary schools unless new educational policies and technologies and increased interinstitutional cooperation are used to create alternative programs. This study analyzed questionnaire data on school size, enrollment decline, program changes, effects of government and collective bargaining, and school-community cooperation from a survey of 312 Ontario secondary school principals and from interviews with 30 of these same principals. It also examined Ontario government documents from 1972-80 covering credit, course, curriculum, and textbook requirements and class scheduling; 35 teacher-school board collective bargaining agreements governing pupil-teacher ratios, instructional load, class size, and "redundancy" (layoff) provisions; solutions to secondary school program problems in eight other Canadian provinces; and a case study of one small northern Ontario school district. Data analysis showed that enrollment decline, bargaining agreements, and societal priorities (as expressed through government requirements) would reduce students' options and the number of teachers and courses and would narrow the range of difficulty levels in schools. Such program constraints may be avoided through new educational technologies; increased cooperation among school boards, municipalities, and provincial officials; and more flexible educational policies. (RW)