We have a couple of instructors who want to add bonus marks to their grade books. The parent categories are set to weighted mean of grades (but have the option to be changed to Simple Weighted, Mean of Grades (with extra credits), and Natural. We have tried all four options and the only one that seems to have the extra credit is Mean of Grades (with extra credits):
We created a Bonus category using the Mean of Grades (with extra credits) and added a Grade item to that category.
Settings for the item
The category is set to exclude empty grades, which should discount anyone who didn't complete the bonus activity, but when we set the category weight to 2 (2% bonus mark), the overall mark for the students who submitted the bonus activity, seems to be skewed so they are being marked out of 100 instead of 102.
If someone can identify where we have gone wrong, it would be very much appreciated.