This issue is most often caused by:
- Your grades do not cover the whole range of points or percentages user can collect. If you are using points for grade calculation, make sure that all possible points are covered from the defined grades. If your best grade has 20 points for “to” and the user collects 21 points they will not be assigned any grade (and will receive None). If you are using % correct answers for grade calculation make sure your grades cover the whole range between 0 and 100.
- You have selected “Calculate grades by % correct answers instead of points collected” to calculate grades but your grades are created with points in mind (or vice-versus).
I.e. if the following is checked, your grades must cover the whole range from 0% correct answers to 100% correct answers:
This checkbox is on the General Settings tab in the Add / Edit quiz page. This is a very common mistake so please triple-check it before contacting support.
- Using category grades without knowing how they work. Please check this guide.
Grade calculations are fully tested and work fine. If you are receiving “None” as grade this can be only because of misconfiguration. Use the variables %%POINTS%% and %%PERCENTAGE%% in the “Final Page / Quiz Result” tab to get better idea why none of the defined grades matches the points you collected (or the percentage correct answers.