I Really Need Help Guys!!

[Grip72]

Ok, i have this assignment for my class and i have to teach my class something, anythign really. As long as i can actually DO it in a calss room setting. I'll give you some examples of what ppl are doing for their topic:
how to wax a snowboard
how to row a canoe properly
how to play 3 chords on a guitar
how to change a flat mountain bike tire
how to properly do a an arm curl
how to do a simple card trick....
, so you guys get the idea right. I have to do the assignment THIS weekend and present it on wednesday. So i have to write upt he instructions and a bunch of crap. SO PLEASE PLEASE, throw me some ideas. And don't say "how to change oil" becaues it has to be INCLASS.....I REALLY NEED HELP WITH THIS PLEASE GUYS!! AND GALS!!