To allow learners to rate courses, log in as Administrator, go to "Home > System Settings > Appearance" (1) and activate the "Enable course ratings" option (2).
Once that option is activated, learners are prompted to rate a course upon completion on a scale of 1 to 5 stars (3).
After each time a course is rated, the Administrator can view the new average rating (4) in the course's dashboard.
Learners can also view a course's average rating (5) in their "My Courses" page and the "Course Catalog".