Where did you learn that?!

Part of girl #1's homework is to memorize the preamble to the constitution. To get her ready for memorization, I was going to have her copy it (it's not that long and it helps her handwriting!).
"But Mommmm," she moaned. "I already know it."
I smiled, "OK-say it."
And....she said it word for word (well some wording was slurred thanks to a horrific orthodontic device called a spacer).
"When did you..."I stopped I was at a loss. We have never gone over the constitution.
She sighed, "Mom, I've known the preamble since I was three."

Now I am speechless. Where on earth... and then a tune begins to fill my head....We the people in order form a more perfect union...

Schoolhouse Rock.

And people say TV rots your brain ;)