My area of Reston is probably the most diverse and the poorest part. I remember a saleswoman warning me against buying the house I did by citing the mantra: location, location, location. There's an argument housing is a proxy for investment in children--parents choose the best schools by choosing the right school district, which would explain why redistricting gets very heated. Anyhow, the local elementary school has had its problems, despite lots of efforts to improve it, including going to a year-round calendar. Fairfax County is proud of its schools, but my school is the runt of the litter.
Not having kids, I don't follow No Child Left Behind that closely. It seems though from this article that NCLB can get very picky, with the fate of a school coming down to 3 students. I'm ambivalent about that--it's possible for unique circumstances to screw up any bureaucratic rule.