Additional fields for after the flight
There should be some additional field which can be filled out or checked after the flight. Like landed, current airport, squak, needs maintenance, something not working, approx gal fuel left, hobbs, tach, flown hours, tie down spot number, ...
So the flight school can see all the airplanes are on the ground, needs to order fuel for the next flight etc.
Especially usefull if nobody is in the office any more when you come back from a flight.