This article in the NY Times deserves reading on a desktop -- or maybe a tablet if there's a way to hover over the bubbles to see what's what.
In the upper right hand corner -- the richest people and the best educational outcomes -- are dominantly towns in Western Massachusetts -- Concord, Carlyle, Acton, and so on.
There's a search box, so you can see what schools in this region look like relative to the country as a whole.
The breakdown by race is interesting and prompts questions. Is the gap due to some institutional bias? Is it due to differences in IQ? And if so, are the differences due to environment, or are there genetic differences?