See what the level of experience is for the group you would be teaching. Going over the very basics at the first class would be helpful --- would answer many questions that perhaps some would be afraid (or embarrassed) to ask...what kind of needle and why? what kind of thread and why? frame? hoop? lap? different techniques (stab stitching vs. running stitch). different methods of marking, etc. A few shops around here offer a beginner hand-quilting class, and it is done in 4 to 6 sessions.