What to do if a girl sticks her hand down your pants at school?

Well that depends on whether or not you want him to. If you don't want him to, let it be known, and if he doesn't stop then turn him in to the authorities. If he is doing it to you when he thinks your not conscience then also turn him in to authorities. If you want him to do it, then enjoy it. If your young, then tell him to wait. Young being usually younger then 16!!!!!