It was first grade, Skycrest Christian School. Tim was quite self-righteous at the ripe old age of 7 and was more than happy to give a lecture to a 6 year old version of me about what could and couldn't be said.
Tim: You can't say bad stuff, like ...(whispering)... boobies.
Me: Hey Tim! What does the ladybug say to the bee?
Tim: I don't know?
Me: BOO, bee!
Tim: I'm telllllllllllling!!! Miss Shields!!!...
So your scripture lesson is Proverbs 20:11 "It is by his deeds that a lad distinguishes himself; If his conduct is pure and right."
My parents are still recovering.