Some aggregation methods in the eClass gradebook allow instructors to give bonus marks for certain grade items. The aggregation methods that allow this are Simple weighted mean of grades and Natural. These two aggregations can be used to replicate most of the other aggregate types if you want to use extra credit grade items but are currently using a different aggregation type.

Extra credit grade items make it possible for a student to score over 100% for a grade category.

1. Go to Grades from the top menu bar on your course page.
   
   
   
   
2. From the drop down menu as seen below, select Gradebook setup.
   
   
   
   
3. For the grade item that you wish to make worth extra credit, go to Edit → Edit settings.
   
   
   
   

Extra credit items for 'Simple weighted mean of grades' and 'Natural' Aggregations (Recommended)

By selecting the checkbox Extra credit, under Parent category, a student’s score for that grade item will contribute towards their total grade but the maximum grade for that item will not contribute to the maximum grade for the category or course total.

Example - Simple weighted mean of grades

Grade items: Assignment 1 out of 100, Assignment 2 out of 80, Assignment 3 out of 10 and marked extra credit
Total points: 180 (A1 total + A2 total)
Category Maximum: 100 points
Grades: Assignment 1 = 70/100, Assignment 2 = 20/80, Assignment 3 = 10/10
Category Total Calculation: ((70/100) + (20/80)+ (10/10))/180=(70 + 20 + 10)/180 = 100/180 = 55.56%
Course Total will be displayed as: 55.56 (Range: 0-100)

Note:

When using the Natural aggregation method, the weight of an extra credit grade item can still be modified as if it were a regular grade item but any adjustments to weight will be ignored since it is extra credit (there will be no impact to the weights of regular grade items). The weights of all regular (non-extra credit) grade items will still sum to 100.

Extra Credit Items for the 'Mean of grades (with extra credits)' Aggregation (not to be used)

This aggregation method is not to be used. As described by Moodle HQ, this method is "An old, now unsupported, aggregation strategy provided here only for backward compatibility with old activities."

For more information on this aggregation method, please see the following link for further support. 

https://docs.moodle.org/310/en/Grade_aggregation#Mean_of_grades_.28with_extra_credits.29 

Notes:

• More information on these aggregation methods can be found in Calculating Your Course Total.
  
• The + icon in the Gradebook setup view of the gradebook is a visual indicator that a grade item is set to extra credit.