What is start date, due date, and expiry date?
All assignments have these three dates:
The start date is when your students gain access to the activity - before the start date, you can see the assignment has been planned ahead, but it will not appear on the student map.
The due date controls the signposts that your students will see on the map, which helps you set expectations. After the due date, students will see the activities as "overdue":
The expiry date is the date when the activity will be unassigned. It will be removed from "Manage Activities", though you will still be able to see reporting on the assignment in the Work Progress report.