You can set the criteria used to calculate grades and display folder-level statistics in the Gradebook and under Performance
To display the Edit Calculation Settings page, click Performance > Grading and then click Edit calculation settings. Alternatively, you can click Customize on the Today's View page
To select a calculation type:
Average (default) is calculated by averaging the raw scores the student received on all assignments, including assignments in folders. If an assignment appears more than once in a course, each instance of the assignment is counted in the average.
Sum is calculated by adding the raw scores the student received on every assignment and dividing by the total possible points for those assignments. If the course is set to display raw scores on the Preferences > Grading page, the raw score appears as "total acquired points ∕ total possible points."
Calculations do not include assignments that are:
Note: Assignments that are not submitted or are submitted after the due date are counted as 0 (zero) unless you extend the due date to some point in the future, allow credit for activities submitted after the due date, or edit the grade. The maximum score (total points) for past due activities that have randomization turned on is considered to be "1." If an activity is assigned without a due date, it is considered to be due on the course end date and the previous rules apply.
Click Apply to All to apply the selected display (released or revoked) option to all folders.