Nursery school (around of the time of the first moon landings)

Kid: The moon is a star.

Me: Nuh uh! My dad bought me a book about the solar system. The moon is like a little planet that goes round the Earth.

Kid: You're wrong. It's a star.

Me: Let's ask the teacher. Teacher, the moon kind of like a little planet, right?

Teacher: No. It's a star.

Me: Are you sure?

Teacher: Yes. The moon and the sun are both stars.

Kid: Told ya!

Elementary School

Mrs. Key: the most important skill you can have in life is spelling. If you don't know how to spell, you'll never be successful.

Middle School

I'd just read about Zeno's Paradox for the first time, and it blew my mind. The only person I could think to talk to about it was my math teacher, Mrs. Wilsey, so I waited until class was over and ran up to her desk. I suspect she wanted to leave for her cigarette break.

Had this conversation turned out differently, I might now be a mathematician. This interaction pretty much destroyed that possibility:

Me: Mrs. Wilsey! Mrs. Wilsey! Guess what I just read? Okay... see: If I'm trying to cross the room, I have to go halfway across first. But before I can get that far, I have to walk a fourth of the way. And before I can do that, I have to walk an eighth of the way! And that goes on forever! You can never go anywhere, because you always have to go halfway first... and then halfway of that ... and then halfway of that... all the way to infinity! But, look, I can walk across the room. See! It's a paradox, and ...

Mrs. Wilsey: Get the hell out of my classroom!

High School: Social Studies

Mr. Mollet: I heard you complained about my tests. Why did you do that? What's the problem with them?

Me: Well ... it's just that ... all the questions are about trivia ... minor facts ... like "What color are the eyes on the statue of Isis?"

Mr. Mollet: For your information, that's what we're studying in this class. "Facts." As in art-ti-facts.

High School: English

Me: Mrs. Ryser, I don't understand why you gave me a C on my short story. You didn't write notes or anything.

Mrs. Ryser: Your main character dies in the end.

Me: Why is that bad?

Mrs. Ryser: Because we're optimists in this class!


Source: QUORA