ATTACH AN ASSIGNMENT TO A GRADE ITEM
In the Navbar, click Assignments.
Click on the context menu of the assignment you want to attach a grade item to, then click Edit Assignment.
Select the Not In Grade Book drop down menu, then choose between Edit or Link to Existing and Add to Grade Book.
*Note: If you would like to remove a grade item from this assignment, you would select Reset to Ungraded.
Click Save and Close.