Grade categories are useful for grouping assignments together, calculating subtotals, and doing special calculations such as dropping the lowest grades.
Category settings can be modified while creating a new category (To add a category, see Create & Organize Items & Categories in the Moodle Gradebook). To change the settings of an existing category:
Below are explanations of the most commonly used gradebook category settings. For more advanced settings, please see Advanced Grade Item Options in the Moodle Gradebook.
Category name: This name replaces the default "Category total" name that displays in the Grader report and the User report. This is useful when you use multiple categories so you can differentiate total columns.
Aggregation determines the kind of calculation used to compute the category total. For more information about aggregation methods, see Grade Calculation in Moodle.
Exclude empty grades controls what the category does when grade items have empty scores for individual students.
Drop the lowest enables a specified number of the lowest grades to be excluded from the category total.
Note: When using Natural weighting, drop the lowest is only allowed when:
Grade type allows you to determine the type of grade associated with this category. There are four grade types:
Maximum grade determines the maximum grade when using the Value grade type. The maximum grade for an activity-based grade item is set on the activity settings page.
Grade display controls how the category total will display in the Grader report and the User report
Letter: The numerical total converted to a letter value using the scale found on the Letters tab of the gradebook. To configure the letter scale used for this conversion, see Letter Grades in Moodle.
Overall decimal points determines the number of decimal points to display for each grade. This setting does not round values in calculations. If the category total is used in another calculation, the real numerical value will be used, which has an accuracy of 5 decimal places.
Item weight is used in the category aggregation to influence the importance of the item compared with other grade items in the same category.