How do I drop the lowest grade(s) from a category?
Case: Non-weighted (or weighted) Categories gradebook:
Right-click the category name and select "Edit this Category".
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.
Notice that the lowest score in the category is displayed in red with a line drawn through it and that grade is not included in the Course Grade.