A: You need to try harder in school!
B: I am doing well in school.
A: Then why are your marks in science so low?
B: I don't understand science, that's all.
A: Is that the same reasoning you have for math?
B: Yes, and English, too.
A: Tell me one single subject you're doing well in.
B: Well, I'm doing wonderfully in my music class.
A: What about history?
B: Only the parts about Woodstock.
A: That's it! You're grounded! No guitar for a month.
B: Great, now I'll surely have a low GPA.