What Administrative Access levels are there?

Appointment Viewer  - allows a contact to view the appointments made. Teachers are generally assigned only this access.  
 Appointment Maker  - allows a contact to make appointments in the Admin tool, but not change any settings on the account.  
 Resource Administrator  - allows a contact to have administrative access to specific resources (teachers). This would give the contact the ability to edit the schedule for the resource.  
 Event Administrator  - allows a contact to have administrative access to the entire event. Administrator - allows a contact to have full administrative access to the entire account.