This survey examines post-secondary plans, aspirations, and characteristics of twelfth grade students in order to develop a medium range enrollment forecasting model of postsecondary education and to develop a data base on high school student aspirations. The survey is the third year of a three-year project undertaken in Manitoba, Canada. Information has been generated on students' career choices and the impact and levels of service required for financial aid and guidance service. A total of 60 schools from eight regions were selected for the 1977-78 Post-Secondary Demand and Enrollment Model-II survey. Questionnaire responses were obtained from 1,904 twelfth grade students. Data are provided on plans after high school; planned date of entry into postsecondary study and study plan; college choice; influence of people, high school activities, and circumstances on students' decisions; plans for financing college education; and family background. (SW)