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.