Firebird,
One thing I did once as a project and tried it out on a student.
I did a tape of the lesson and gave tunings on the tape so he could tune to me.
I did several tunes on it and went over it slowly so he could get the hang of it.
For this kid it worked, I was going to put it all together in a cassette and book which is still on the back burner, but it did work.
I do however get frustrated as hell with teaching, generally boys all want a magic spell that you are going to cast and they will be Eddie Van Halen, when they find they actually have to work 90% drop out. Girls on the other hand have stickability.
good luck with it, but seriously consider the tape, it sure advanced my student.
Then I left the country and lost touch.
Clive