Sometimes you make it to school in the morning, and you just don't want to be there. I'll be a senior in the fall, so needless to say, over the past eleven years I've gotten pretty creative and tweaked my system until it was flawless. So here it is, the method that never fails...
Best of Luck! This method has sent me home many times, hopefully it will do the same for you.
Step 1: Go to the bathroom.
Like all other good ways to go home, a trip to the bathroom sets the mood. Go to the bathroom, bring your cell phone, sit down on the toilet, and enjoy 7-10 minutes of your favorite game. If you're going to play some games, make sure your game settings are on silent.
If you don't bring your cellphone, just chill in the stall for a while. Or you can make a quick stop by your locker and get your calculator, TI-83/TI-84. I have a bunch of games on mine. Just relax and burn up some time.