Course Leaders and Followers
Course Leaders and Followers are courses that MUST be taught in the same periods.
Your music teacher wants a Big Band effect, so he chooses to teach Band 8, Band 9 and Band 10, totaling 40 students as two sections of 20 each. You designate Band 10 as the course leader and Band 8 and 9 as the followers.
The only double period courses are Home Economics 10, Woodwork 10 and Art 10. Your students must choose one of these for each semester. You know from experience that the best way to schedule these courses is in the same periods. So choose Home Economics 10 as the course leader, and Woodwork 10 and Art 10 as the followers.
It is immaterial to WebSched which course is the leader and which are the followers.