To remove access to a teacher's grade book temporarily
  1. Navigate to Core >  Security> Roles > User/Access > Profile
  2. Select the Teacher Role
  3. Select Tasks under the Role Section
  4. Navigate to Manage Grade Books (Can do Ctrl + F to search for it in the list)
  5. Select the Edit button across from Copy Gradebook and View Gradebook
  6. Unmark the checkboxes for Desktop and Ap.User-added image
  7. Save & Close
  8. This will remove the access temporarily for teachers to see their Gradebooks which include course rosters.