Another favorite game of mine was the first game I can remember that I was in when I was in high school.
It only takes a can of whip cream and a lot of cheesy poofs! Have 3-4 pairs (6-8 students). Have one from each pair sit in a chair with a trash bag over them (to protect their clothes!) Spray whip cream on their face (if you can get swimming goggles to cover their eyes, thats a plus!) Then have their partner stand about 5 feet away and when the music starts have them to toss cheesy poofs onto the whip cream! The pair that has the most wins!