How do I manually add a grading column?
To add a column to the gradebook you'll need to add an Assignment under the Assignment tab. How do I create an assignment? Set the Submission type to No Submission or On Paper to simply have it be a column in the gradebook. My practice for doing this is to use what I call the "easy button" when creating assignments. Clicking the Plus icon to the right of an Assignment Group brings up this very simple interface which works well for what you are trying to do.
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