Oh, and involving them in the planning of the teaching process is great, too. There was nothing more I loved than feeling like I was part of a therapy session as being more than just a "client".
I loved it when the therapist would ask my opinion on what we should do. And, of course, if it was something completely outrageous, they'd have subtle ways of turning me around, too, hehe. But for the most part, making them feel like your a team working together on the project of "themselves" is great.