Have there been tests comparing adults on common core type concepts after school? A 5, 10, 15 and 20 years later view would be interesting.

It seems pointless to spend billions teaching people things they don't use and won't remember. I had an argument with an adult about whether Colombus sailed on the Mayflower. Seriously. Why bother?

Just teach kids how to learn, how to be healthy and how to make good decisions.