My course reviews follow a standard metric... 5 axes cover 1 star each, which are then in turn divided into 3 narrower topics each. Each of these topics is scored Pass/Fail (or Love/Hate) and listed in the respective Pro & Con review sections. For each axis, passing 0 topics scores 0 stars, passing 1-2 topics scores .5 star, and passing 3 topics scores 1 star.