The Princeton Cooperative School Program (PCSP), an Upward Bound project at Princeton University, was initiated in 1964 and continued until October 1976. Program services were directed toward low-income, educationally disadvantaged, high potential adolescents, and the program's goal was to enlarge the pool of qualified, low-income, disadvantaged students accepted for admission to college. The 26-month period that the average student was involved with PCSP consisted of five program phases: (1) summer residence; (2) the junior academic year; (3) the second summer; (4) the second academic, or senior, year; and (5) the "bridge summer," or work-study. For each phase, program design and management, special services, and data concerning student participation are examined. Descriptions are given of selected courses. Appended are: statistical data, program and course evaluation forms and data, records of a sample course, and a sample reading list used. (MSE)