Son's science class this year is biology. They're studying the classification of organisms now, so I told him my Chordata joke. He rolled his eyes, patted me on the shoulder, and lovingly called me a nerd.
So I sent the joke to his science teacher and told the teacher to tell it to the class and credit me. Do not mess with nerds.
The teacher replied with this joke.
A tree leans over and speaks to a mushroom on the forest floor. "Mushroom, you're boring."
The mushroom replies, "No I'm not. I'm a fungi."