* Notes for Class Profiles These tables summarize the class offerings in a course subject area over time and by size and type of class. To avoid combing lecture class sections with lab and activity sections, the figures below are broken out by "primary" class sections (mostly lectures), and "sub-sections", which are generally associated lab/activity classes. Supervision (S-factor), and independent study classes generally have small enrollment numbers because of the one-on-one nature of instruction. These types of classes are shown separately below.