And then I use the iPad to take all my notes during the flight including takeoff and landing times, number of landings and type of approaches.
I find a pencil and a piece of paper work perfectly as well.
the question was whether it would be a useful tool during instruction.
As wonderful as these devices may be, I have never found them of any help when giving instruction and in many cases are a totally unnecessary distraction.
Not so long ago a man arrived to do a test, I asked for his CAA reference number and he asked if he could put his ipad in the fridge because it had overheated (in his car) and had shut down.
As a moving map display whilst flying they are superb.