Man, I stumbled across this flash game where you place the states in their correct positions in the US --
http://www.games1.org/games/place_states.swf.
The first time I got something like 42%. I definitely forgot a lot since elementary school - an embarrasing amount. As I did it I kept having all these revelations -- wow, the east coast is really smashed together. Nevada touches Colorado? Whoa, Minnesota borders Canada? Hmm, I had no idea that's where Arkansas went. The worst part is that I screwed up my own state, Colorado, almost every time. It's not as "West" relative to the others as I thought, apparently.
It was really quite sad. After about 6 or 7 times I started remembering my schoolin' as a youngin -- 84% with Avg Error of 21 Miles and in 287 seconds.
How do you score? (Trust me, it's way harder than you think..)