This article explains how to set up an assignment that allows students to resubmit if needed.

2. Go to the assignment

3. Click the Settings tab

4. Change the Cut-off date so the student will be able to submit. This will not affect other students who submitted and have received a grade

5. Go to the Submissions settings section and change Additional attempts from Never to Manually

6. Save your changes

7. Return to the assignment and click View all submissions

8. Find the student, click Edit, and then click Allow another attempt. Only this student will see an Add a new attempt button