Awesome! Wish I had this a while ago during school. This is a good learning tool too since you can see how each addition affects the matching. I like Tycho's id

Awesome! Wish I had this a while ago during school. This is a good learning tool too since you can see how each addition affects the matching. I like Tycho's idea about have a little cheat sheet. That would add to the "learning tool" idea substantially.