My doctor was making small-talk with me the other day. He knew I was a teacher, so he said, "How are the students this year? How is your class?"
"Fine, thanks. They're always nice kids," I said.
To which he replied proudly, "My daughter is in first year."
Without missing a beat I chirped, "Oh, first year of teaching?"
He grinned shyly at my misunderstanding, "No. My daughter is in first grade."