While grading, I used to be able to "mute" an assignment in the top left by clicking on the eyeball. This allowed me to grade all speeches but only allow students to see grades when I "unmuted" the assignment.

Now I can "hide" grades, but it doesn't work the same. One student's submission says it's hidden, but she still can see her grade AND the rubric I attached to it. I specifically went back in and hid hers; same thing. 

HOW can I hide/mute grades so that I can release them all at the same time so I can explain the rubric/grade to the whole class instead of fielding the same questions over and over?

Thanks.