This is an idea I had from an old Calvin and Hobbes comic, where Calvin figures out a way past his teachers hawk-like gaze, and get out of school. But this time, you must figure a way out of school (be practible: no atomic bombs, weapons, or ending with the teacher hurting), and the next person must figure out a way to prove it not possible, then come up with his own, example:
1p: I throw a paper ball across the room, and while the techer is distracted, sneak out
2p: Teacher will see who threw it, which was you.
2p: Ask if I can use the restroom, then sneak out a bathroom window.
Also, no repeating escape schemes, and no saying "the teacher suspects it" or whatever.
Here is our starter: Ask the techer if I can go to my locker.
go to lunch the get a packet of casup got to class make it look like a bloddy nose then ask to got to nurse then on way to the "nurse" go to the bathroom and sneak out the window
Some kids might tattle and say it wat ketchup/catsup.
Bring bubblegum to school, chew it in class, and teacher asks me to go spit it out, then leave the room for "the trash can out in the hall," then leave the school.