To reset a user's progress in a course, visit that course and navigate to the Users tab.
Check in the user (or users) you want to reset his (their) progress in the course from the select column check box (1) and then click on the With selected option (2).
A pop-up window will appear with various options. In the Progress option (3) you will see the following:
- Reset: this resets the progress of the user in the course
- Reset and revoke a certificate: this again resets the progress of the user in the course but also revokes any certificate he might have in the course.