There is a blue tab on the Course Catalog screen - Assign Average Rules to Sections - which will update the Horizontal Avg setting for courses based on the terms that the courses are scheduled to meet.
Article ID: 337
Last updated: 19 Jan, 2011
Scheduling -> FAQ -> We are trying to assign new horizontal averaging rules to each section of the courses, but we don't have that choice in the drop down under field to update. How do I assign them?
http://www.imgsoftware.com/kb/entry/337/