King of The Hill Season 13 Episode 5

Gym Teacher: Okay, students, circle up! Today, the only muscle you'll be stretching is your noggin.
Bobby: What happened to kickball?
Gym Teacher: Gone. Over. Eliminated. Effective immediately, all classes, including gym, will be teaching math and reading to help prepare you for the test. Okay. Dooley! I've got a five-pound medicine ball in this hand and a ten-pound medicine ball in this hand. If you were to multiply the weightage of both balls together, what would you get?
Dooley: I pass.
Gym Teacher: Oh, for...(groans) Hill?
Bobby: Can you use it in a sentence, please?
Gym Teacher: I just did, you little knucklehead!

Peggy: I will tutor you, and flashcard you until you're up to a C-.

Bobby: I hate letter grades. Why can't we just go back to the gold star smiley face stage?