I would have the beginner just do very simple things like flying a straight line.
You will be supprised in the number of great pilots that can't fly the length of the run way in a straight line. Do a simple loop and make it round. I spent two days doing this before I learned the right throttle managment to make it look round.

Try 45 degree uplines and keep them straight and at 45 degrees.

Just these three things are a good start.