The best teachers that I had were always the ones I never wanted to disappoint.

Here, let me break it down for you, so you know what I say is true: Teachers? Teachers make a difference! Now what about you?

The best teachers that I had were always the ones I never wanted to disappoint.

Teachers shouldn't make the mistake of always thinking they're the smartest person in the room

I have a policy about honesty and ass-kicking, which is, if you ask for it, then I have to let you have it.

I implore you, I entreat you and I challenge you to speak with conviction. To say what you believe in a manner that bespeaks the determination with which you believe it. Because contrary to the wisdom of the bumper sticker, it is not enough these days to simply question authority—you've got to speak with it too.

You want to know what I make? I make kids work harder than they ever thought they could. I can make a C+ feel like a Congressional Medal of Honor, and I can make a...