If this is geared towards sewers that aren't quilters, I'd make up a packet of information to go over with them the first class. I just taught an intermediate class and assigned homework :-) thinking they at least knew the basics, but when they came back both sewed at 5/8" and ironed the seams open. :shock:
So grain of fabric, how to get an accurate 1/4" (maybe some different suggestions on this, because of the different types of machines some have), maybe explanation of different components (square, hst's, qst's, etc). Start off very, very basic and then show HOW to use rotary cutter (yep, some don't know the proper way of doing this :shock: SCARY!) Start with a project that incorporates squares, like a 9P so they can get their seam allowances set up correctly and then maybe turn it into a D9P at the end to give it some zing. :lol:
Good luck and keep your sense of humor! :lol: