The Do You Know? series provides tips for working with quirks in Canvas. Please email Courseware Support at canvas@pobox.upenn.edu if you have any questions.
Why Does Canvas Let My Students Submit Their Work After the Due Date?
The guiding principle behind this default ability is that decisions about whether or not an assignment should be accepted late is an instructor’s prerogative, so rather than deciding for the instructor that students cannot submit their work after the due date, Canvas leaves the choice about whether or not to accept the late submission up to the instructor, marking it “late” without taking any further action.
If Canvas were to automatically block students from submitting after a due date, allowing extensions would require working with complex settings, and intervention from a Canvas support specialist would most likely be necessary. By accepting late submissions by default, Canvas obviates this need and defers to the instructor’s judgment, letting them manage late submissions according to their personal policies.

Thus if you gave a student an extension, the submission would be marked “late,” but you would be able to grade the submission according to the grading terns you defined for the extension (full credit, partial credit, etc.). If you did not give a student an extension but they submit late anyway, you can decide how or if to grade the submission according to your lateness policy.

I Don’t Give Extensions. Can I Stop Late Submissions?
Yes, in addition to a due date, you can use an “Until” availability date to completely cut off student access to assignments after a certain date, including the ability to submit an assignment.


More Information
Please click on the following link for information and instructions on using availability dates in Canvas:
What is the difference between due dates and availability dates?
Please contact Courseware Support at canvas@pobox.upenn.edu if you have any questions.
Last Updated: 19 Mar 2015