Dewey: Billy what makes you angrier than anything in the world?
Dewey: Billy, we've already told me off, now let's move on.
Billy: You're tacky and I hate you.
Dewey: Ok, you see me after class!
In the scene where Dewey and Ms. Mullins are in the bar, the shots from behind Ms. Mullins sitting down show that her left hand is on the table. However, the shots showing the front of Ms. Mullins show her arms folded.
All of the children are competent musicians, and they are all playing their own instruments.