I was disturbed to see that you are advocating the use of acetone in the
classroom . I knew a woman (at a company I once worked for) that was cleaning
decals off of her refrigerator with acetone. Then she flipped on a light
switch in the room. They very small spark from the light switch ignited the
fumes from the acetate. She died. Please rethink using something so flammable
in the classroom.