If you would like to know how each school (elementary, middle and high school) rank based upon standardize test results check out http://www.psk12.com.
Although you can see for free the results from 2001 , you can subscribe to their service and get the latest data. If education is important to you, I'd recommend it that you pay for the service. I did and it was worth it.
Another site you should check-out is http://www.city-data.com.
It compiles lots of data on each town such as avg income, avg housing price, crime stats, etc. The most helpful section to me was the blog much like this one.-Real people give you real answers to your questions about the town(s) your investigating.
Happy house hunting!