Summary
You can choose to automatically assign zeros to missing work past the due date. Students and groups can still submit work after an automatic zero is assigned. Then, you can grade as normal. This article will show you how to enable automatic zeros for past due work.
Body
Note: Students with due date accommodations will not be affected by this setting. If they are assigned to a group, the group members will inherit the accommodation for the assignment as well.
1. Navigate to the course Gradebook:

2. Click on the Grid View or the List View.

3. Click the settings gear icon to the right of the page on either view:

3. The Grade Settings panel will appear. Under Automatic Zeros, select “Assign automatic zeros for past due work”:

Your selection is saved and applied automatically. You may close out of the Gradebook Settings panel.