Public Schools in Boston

I was reading "Geeky Mama blogs about school lottery" in today's Boston Globe.  I found this stat fascinating:

It’s dizzying, and daunting - perhaps too daunting for some, which may be one reason about one-quarter of the 80,000 school-age children in Boston don’t attend Boston public schools.

Think about that . . . ~ 1/4 of the school-age kids in Boston do NOT go to public school.  I wonder if any other towns in MA have similar stats?

Oh, and her blog is Braving the BPS Lottery.