My kids aren't very familiar with a lot of idioms which can lead to confusion sometimes in the classroom. In general, my students tend to take a lot of what I say literally. It can be funny, but at the wrong time, it can be incredibly aggravating. Yesterday in a bout of frustration I said to Maverick, "No matter what I say you want to argue. If I told the class the sky was blue, you'd call out, 'It's green!'" Beat. "The sky's not blue! It's white!" Wow. Thank you for proving my point, without showing any understanding of it. And that's why you're not supposed to engage in those types of conversations/arguments with kids.