If you REALLY want to get a teacher good, soak everything in the room with water. Then put baking soda in the air vents when there isn't any air blowing. Then turn the A/C on as low as it'll go and get the hell out!

One time a teacher gave out shaving gel as a christmas gift. I kept that till april fools. Right when Biology was over and everyone left for lunch, I took my time getting ready. When everyone left, I went ballistic.

I put some on the board saying "Chris wuz here". Then I put some of it on the back of the teacher's chair (specifically where he'd grab it to pull it out). He even had a roll of paper towels out. I sprayed the rest of the contents of the can on them.

At the end of the day, he said I was in "big trouble" then he laughed his ass off.
