Me: Because of the recent craze in eating shark fins, sharks are in danger of going extinct.
Puerto Rican Girl writes "exting" on her paper.
Me: (Quietly) "Extinct" is actually spelled e-x-t-i-n-c-t.
Puerto Rican Girl: This isn't English class.
"I have not failed. I've just found 10,000 ways that won't work." - Thomas A. Edison