Ive been eying up some courses for around a year or so, but none of them really offer what I was after. I think it would be an easy course, for you and students, to concentrate on fender style body construction and use pre-made necks.
You would still have a lot to get through with a few students. wood selection, thicknessing/jointing, basic routing. And as Wez said there is the element of design and being able to draw things/visualise them accuratley. Get them to make a strat / tele based design around a certain bridge and neck pocket config. then give them some artistic room to move with the body shape and control layout.
A basic oil finish will be more than satisfying enough for a novice builder. Not to mention electronics / setup skills which you would also need to teach!
How long would you have per session and how long would the course be? youd need to be quite conservative as to what they can achieve in the time available. You dont want 5-6 unfinished guitars being rushed in the last session!
edit: oh, and Wez is a great teacher. He very kindly gave me some instructions on fret dressing and helped me out alot with my first fretjob.