Escape the School

Your first class is Math class. The teacher is menacing. His eyes are menacing, his ugly face is menacing, even his glasses make you tremble. He won't let anyone out of his sight.

Your classmates include:
Shortie, the smallest kid you've ever seen.
Duddie, the dumbest kid you've ever seen.
Tom, your best friend. He might help you, as he is as bored of this class as you are.

What do you do or use?