During 1970-71 partial or full semester systems were in operation at different secondary schools. Principals, teachers, students, and parents from schools in each of three categories: partial semester plan, full semester plan with a static timetable schedule, and full semester plan with a rotating timetable schedule, were sent separate…

Achievement and student attitudes were studied using data from 250 secondary Ontario mathematics classes. The differences between semester schools versus year-long schools were examined. Hours of instruction and teachers' experience were also noted. Lower achievement was observed in semester classes, with no advantage in student attitudes.…

Covariance structure modeling tested four alternative models of determinants of student effort changes. Four alternative models were investigated using 167 junior and 155 senior high school students. Effort ratings by teachers were obtained for 282 of the students. The importance of changes in students' perceptions of ability is discussed. (SLD)