How do I drop the lowest grade(s) from a category in Gradebook2?
If you are using a Non-weighted (or weighted) Categories gradebook, you can arrange for a number of the lowest grades in any category to be dropped from Course grade consideration.
The gradebook must use categories (weighted or non-weighted) to use the drop lowest grade functionality.
Go to Gradebook2.
Select Gradebook2 from the Tool Menu in your site.
Case: Non-weighted (or weighted) categories gradebook:
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The gradebook has 3 categories (Quizzes, Papers and Participation). The instructor would like to drop the lowest grade from the Quizzes Category.
Right-click the category name and select Edit this Category.
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This displays the Edit Category panel on the right.
Enter the number of lowest category grades to be dropped, then click Save/Close.

This will drop the lowest grade(s) from the Course Grade calculation.
Example 1:
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Notice that to the left of the Quizzes category name is a "-1" indicating that the lowest grade for this category will be dropped from the Course Grade.