I was asked to attend the new faculty orientation and offer words of wisdom about teaching our students. I gave them three great words to use in the classroom and I'll share them here: “I don’t know.” It’s liberating to say "I don't know" in the classroom.
There are lots of times I'm caught off guard and there are many times I just don't have the answer. So I say things like "I have to think about that" and "I’d have to read up on that before I give you a clear and confident answer." None of us knows it all, so I take the pressure off myself by not pretending to be a know it all.