3rd grade

Kid 1: Mrs. Eckard! He said the F word!

Me: Oh no. Why did he do that?

Kid 1: He got mad.

Me: Oh. Well, come here (kid 2).

Kid 2: I didn't say that! I didn't!

Me: Well, can you spell for me what you said he said, (kid 1)?

Kid 1: F- R- E- A- K- I- N- G.

Me: Oh.

And in case you were wondering..."the S word" is often "stupid".

Although this one time, I was teaching Kindergarten and there was this kid who didn't speak a lick of English. He was Chinese, and couldn't even tell you that he had to go to the bathroom. Sometimes, he could understand what you said, but he just couldn't get words out of his mouth. So this boy made him mad in class and he flipped him off. So, I said, "Darling, do you know what that means?" His enthusiastic response? "Yes! It mean F@$%* you!"

Sometimes it's really really hard not to laugh when you know you shouldn't.