Submission of the last date of attendance/activity is required for some grades (see Grading System). This is based on a federal regulation mandating that the university inform the Department of Education when students stop participating in a class, or classes. There is a wide definition for the last date of attendance/activity, i.e., it does not simply refer to attending class. This includes: the last time students attended class; the last time students took a test/quiz/exam; the last time students participated in a chat/discussion; the last time students submitted homework; the last time students used D2L; the last time students participated in a lab; and/or the last time students participated in any class activity, either inside/outside the classroom or online. The last date of attendance/activity is calculated by using the latest date students participated in any of these activities.