Enabling Completion Tracking in a course allows the instructor to put check boxes next to work for students. It will have no effect on their grade. It will also not be track-able on a course-level without further configuration. (They just get the visual confirmation of check boxes, which can be helpful for students in managing and planning their workloads.)
Navigate to the course you wish to enable Completion Tracking in.
Expand the Actions Menu (Gear icon) in the top-right of your course.
Select the Edit Settings option from the menu.
Expand the section called Completion Tracking
Change the value of Enable completion tracking to Yes
Click the Save and display button at the bottom of the page.
NOTE: You won’t see any overt changes to your course