Teach your children well, and while you're at it, teach them when to use good. (Hint: Use well when you're talking about your health, and good to describe your general state of being.)
We saw this article about teaching kids grammar — even making a game of it — and we liked it!
Teach Your Child Grammar Early
Still, this is probably time to confess we let our kids watch Schoolhouse Rock. It's TV, but it's so much more.