This one started right at the beginning of the lesson...
(Kid enters room)
KID: ¡Hola! ¿Cómo estás?
ME: Estoy cansado.
KID: I don't know what that means.
ME: It means I'm tired. I thought you were taking Spanish this year.
KID: Just because I'm in Spanish 2 doesn't mean I know all the words yet.
ME: Of course, but I figured that's one you'd know by now.
KID: I don't actually try to learn in there; I just want to pass.