When using a Weighted Mean of Grades aggregation, every item and category can be provided a weight. Instead of adding up point totals (as the Natural aggregation method does). Weighted Mean of Grades will calculate a course total by proportions of weights assigned to individual items.  To calculate grades this way, you must fill out weights for items and categories:

1. In the Administration block, click  to go to the gradebook.
2. From the gradebook, click the  tab near the top.
3. You will see a  column in the list of grades.
4. For each graded item (manually entered and activities) Under the  column, there will be text boxes next to each grade item and grade category. Change these weights from their current (automatically calculated) weights to the weight you want the item/category to have.
5. Moodle automatically adjusts the weights for other items so that they add up to 100%.
6. Click the  button near the bottom.