In the Gradebook setup, Click '...' under "Actions" beside the main course category. Select "Edit category" from the dropdown.

Click on the "Aggregation" dropdown.\
For an explanation of the available aggregation types, click the 'Help' button next to the Aggregation column heading. Weighted mean of grades and Simple weighted mean of grades are the two most commonly used methods of aggregating marks for a course.

If using Simple weighted mean of grades or Sum of Grades, then in the Max grade column enter the maximum mark each category can earn. Make sure the Course total is a figure you can work with.

If using Weighted mean of grades, then in the Weight column enter each category's weighting in relation to the final course grade. Note: 30.00 = 30%. Make sure the weightings add up to 100%.

In the Gradebook setup, Click '...' under "Actions" beside the category. Select "Edit category" from the dropdown.

Click on the Aggregation dropdown. Select the aggregation type appropriate to that category. For an explanation of the available aggregation types, click the Help button beside to the Aggregation dropdown.

Complete the fields in the Weight or Max. grade columns, within each category, as you did for course totals in steps 2 or 3.

When you have assigned all the weightings, click Save.

Assign grade item/category weightings