Aggregation: Aggregation is the method by which Moodle will calculate grades.
Natural: This method operates as a sum of grade points, or if you turn on the weights for different items and categories by checking the boxes next to weights, it will perform weighted averages. We recommend using this method and only this method as it makes the Gradebook interface the easiest to use. *NOTE – this aggregation method replaces all of the mean of grades methods AND the sum of grades method, including giving extra credit.
Highest grade: This method drops all but the highest grade obtained.
In almost all cases, choose Value for Grade type. Calculations cannot be done on the scale and text types.
The 3 grade type options are:
Value - A numerical value with a maximum and minimum
Scale - The scale available through Moodle is based on a particular theory (Separate and Connected ways of knowing) and is appropriate for courses built around this particular approach
Text - Feedback only (cannot be aggregated into the course grade)