Well, I would hate to teach this way, but I have a friend that does this for her "just for fun" students. Get a digital keyboard with midi imput, and you will find music books with music written in the "big notes" you can purchase midi or cd's to go along with these books. The midi or cd will play and orchestral version of the songs in the "big note" books, and the student plays along with it. This particular teacher says that they really get a kick out of playing this way. I couldn't imagine teaching this way, but some people really want to pay for nothing. But that is my suggestion, if it is worth anything.