For Teachers with Quarters:

1. Go to Gradebook.
2. Go to bulk edit (3 dots on the right side).
3. Make sure grades have a grading period. If not, assign either quarter 1 or 2.

For Teachers with Semesters:

1. Go to Gradebook.
2. Go to bulk edit (3 dots on the right side).
3. Make sure grades have a grading period. If not, assign to semester 1.

Here is a video showing how to do this.