[Not2B]

OK, I don't know how long your meetings are... but this might work.

Teach some basics to the entire class. Because you only have one computer and projector, have the class draw one big item. I would envision a large solid model of something. Take one student at a time, and have them each draw one solid and encorporate one feature. NEXT! The entire class can watch and learn, but make sure you help talk the student's through their part (don't want to embarass or discourage the shy people.)