Results from the Second International Science Study showed achievement differences in biology and chemistry tended to favor Ontario students enrolled in non-semestered classes, but attitude findings were more favorable among students in semestered schools. (LMO)

The popularity of semestered timetable organization is founded on the belief that this organizational change makes a positive contribution to the social, emotional, and cognitive growth of students. This research attempted to test the validity of that belief by identifying the claims made for timetable reorganization, formulating these claims as…

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.…