George: Never mind. Yeah, I told Brenda teaching wasn't really your thing.
Sheldon: Well, it's not that I can't do it.
George: Don't worry about it. You're good at a lot of things. Teaching just ain't one of 'em.
Sheldon: I know what you're doing. It's reverse psychology.
George: I don't know what you're talking about. [walks out]
Sheldon: It's childish and obvious.
George: [o.s.] So you'll do it?
Sheldon: Yes, I'll do it.

Mary: So he's really good to graduate?
Principal Petersen: He sure is. I got to tell ya, usually when kids leave school after two years, it's not for college. It's for prison or pregnancy.
George: Well, between Georgie and Missy, we may hit the trifecta.
Mary: George!
George: Well, I'm not rooting for it. It's just a thing that could happen.

Georgie: You know what else is nice?
George: Hmm?
Georgie: I get to learn from all your parenting mistakes.
George: I'm starting to think letting you live this long was one of 'em.
Georgie: Like that. I'd never say something so awful to my kid. [George scoffs] Thanks, big guy.

Georgie: A bill? Really?
George: Room and board, buddy.
Georgie: $50 a month for food?
George: The way you eat, I should've gone $50 a week.
Georgie: Laundry services?
George: Your poor mother has to touch your underwear.
Georgie: What's the $10 a month "peema" charge?
George: Oh, P-I-M-A, that's a "Pain in My Ass" tax. My way of getting compensated for you taking years off my life.

Sheldon: Okay, your basic arithmetic skills are disappointing but functional.
Billy Sparks: Thank you.
Sheldon: All right, let's talk about negative numbers.
Billy Sparks: I'm all ear.
Sheldon: "Ears."
Billy Sparks: No. "Ear." This one's clogged.

Sheldon: Okay. Negative numbers are numbers that are less than zero.
Billy Sparks: But zero's nothing.
Sheldon: Yes.
Billy Sparks: So how can you have less than nothing?
Sheldon: Let's see. How about this? If you have a dollar, that's one. If you have no dollars, that's zero. But if you owe me a dollar, that's negative one. Does that make sense?
Billy Sparks: I think so.
Sheldon: All right, we're making progress.
Billy Sparks: Mom! I owe Sheldon a dollar.

Sheldon: All right, I'm given to understand you have a test coming up on negative numbers and fractions.
Billy Sparks: Yeah.
Sheldon: So, what part don't you understand? [Billy is silent] Oh, boy. Let's take it back a step. Where do you stand on addition, subtraction, multiplication and division?
Billy Sparks: I'm against it.
Sheldon: [exhales] [quietly] Oh, boy.