Bendo is spot on. DEMONSTRATE, TEACH, TASK. So for example on the primary effect on the elevator the lesson goes:
DEMONSTRATE: Bloggs off the controls, looking straight ahead. You pitch the a/c down. Tell him this pitching down and then you pitch up and tell him that this is pitching up.
TEACH: Bloggsie now follows through on the controls. You pitch down again, but this time you talk about the forward pressure on the stick, the increasing gap between the cockpit coaming and the horizon and finally of course the increasing IAS and noise. Same pitching up but everything reversed (of course!)
Question: Do you understand what I have just showed you Bloggs?
TASK: Brief Bloggs to pitch down, hold, then pitch up back to the datum attitude. (Just like you just taught him)
Question: Do you understand what to do Bloggs?
If happy give Bloggs control and he then has a go.
If at any point during the lesson Bloggs gets confused, stop and repeat that section. Also don't talk to Bloggs when he has control. It puts 'em off.
Final point. Surprisingly most Bloggsies can teach themselves to fly inspite of you! So let them do as much of the flying as you consider is safe!
Enjoy your teaching. It's the best thing to do in an aeroplane (besides aeros!!)
Vigi