From your course, click on Gradebook. To create a category click the Gradebook Settings Cog. Scroll down to Grade Categories. You can click Add New Category or use one of the default categories. Return to your Gradebook, click on the column icon, and click Edit. In Settings view the current Grade Category. If you want to change it, click on the current category and select the correct one from the list. . Return to Gradebook. Select Overall Grade and click Edit. Find the category that you want to drop scores and click Edit Calculation Rules. Click Enable to turn on the category calculation rule. Select Drop Scores and define how many will be dropped and if they are the highest or lowest scores. Click Continue. The Category will now reflect the current calculation rule. Click Save before navigating from the page.