Mary: (to a student who is goofing off in class) Go home.
Joshua: But my Pa said--
Mary: I don't care what your Pa said! I say go home!
Joshua: I don't--
Mary: Look, we are not here so you can goof around and make silly jokes. I'm here to teach, and these students are here to learn. You come back when you're ready to learn, and not before. And be here when the bell rings, or don't come at all!
Joshua: But my Pa told me--
Mary: You tell your Pa to come to me. I'll be glad to tell him why I sent you home. Go on, get!