To add a new column to the students' grades (grade item), do the following steps:
1. After logging in as a Teacher, select My Courses from the navigation tab on the left.
2. From the drop-down menu, select the course for which you would like to view the grades.
3. Select the class that you would like to view.
4. Select the Grades tab.
5. Click the + Add Grade Item button.
6. Click the Name box to type a name for your grade item.
7. Select the grading period from the Grade Period drop-down menu.
8. Select a suitable category from the Grade Category drop-down menu.
9. Enter the maximum grade a student can get in the Max Grade box, and enter the lowest grade a student can get in the Default Grade box and we can be edited later.. and can be left empty or 0.
10. Click the Add button.
Watch the below video :