To manage staff assigned to a classroom:

1. Navigate to the "Classrooms" module and select "Overview".
2. Locate the classroom for which you want to manage staff.
3. Under the "Action" column for that classroom, click on "Manage Staff".
4. You will see a list of currently assigned staff and potentially a list of available staff.
5. To assign a staff member, select them from the available list and click an "Assign" or "+" button. To remove a staff member, select them from the assigned list and click a "Remove" or "-" button.
6. Click "Save" to confirm your staff assignments.