You can give titles to the other admins and your staff/teachers by following these steps.
- Click on the community in the left menu
- Click Manage icon
- Click Staff
- Click on the name of a staff member
- Click Change Role icon show below
- Enter the Title Ex: Asst. Principal
- Click Save
PS: The same steps can be followed to give titles to other admins in the class, however, you need to do it from the Manage screen of your class page.