You can only delete assignments that don't have any grades recorded against them. If you need to delete an assignment, first remove any grades from the Grades tab in the Grade Book. Then you'll be able to delete the assignment.
Select Students from the Jump to Module pull-down list in the upper right corner.
Select Grade Book from the Grades menu, then click on the Assignments tab.
Select the course/section from the Assignments for pull-down list, if needed.
Click the icon beside the assignment. You're asked to confirm the action.
Click OK, and the assignment is deleted.
Return to Grade Book Overview
Return to Grades Overview