What exactly is an "overchosen" school?

They say a picture is worth a thousand words – here is some eye-candy: http://lottery.cb-pta.com/test/visualize.html

I wish I could embed it here in WordPress, but I have not figured out how to do that (yet). This is just a taste of what I am doing with Kindergarten Lottery data I have received via FOIA from the school district. Personally, I think this graphically (and dramatically) demonstrates how some schools are “overchosen”. The charts are somewhat interactive so please mouse-over to see more information.

Please keep in mind this is merely an appetizer; I intend to have real charts driven from real data in the very near future.

PS – if you try to explore this website a bit, please keep in mind that I recently changed hosts and am in the midst of updating from the old, text- and tech-heavy format to the newer, lighter format. But, hey, I’ll entertain questions about the old stuff as well. 🙂