The following three quotes all come from the same girl. Each of them alone is pretty funny; that the same person would say all three is hilarious:

After her chemistry teacher explained that blowing air through limewater makes it turn cloudy:

Woah, miss, do we breathe out chalk?

During a history lesson:

Ok, I just wanna check here, the Nazis were the baddies, right?

Finally, in a chat with her geography teacher:

Teacher: We’re going to Italy this summer.
Her: Oh! So am I!
Teacher: Really? Whereabouts?
Her: Barcelona!