Hi K. I happen to be a realtor in the No VA area. You can go to http://www.fcps.edu -- Even better, you can contact
Jay Mathews - Washington Post Education Reporter by email or read some of his most recent articles on Virginia's high schools. Finally, go to US News and World Report--go to best high schools search then go to Virginia. There you will find your answer (according to their ranking methodology. While I understand that your children are still in primary and middle, remember that primary and middle schools are the feeders into the highschool. So, if the highschool is good, more than likely your primary and middle schools will be as well. At the moment there is some restructuring on the boundaries so be sure to research that as well. Hope all this helps and good luck.
PS - Aside from all of the above, you should also identify a pediatrician or pediatric specialist. They may have the resources to provide you with the best advice regarding schools for your son. Realtors, you may already be aware, cannot legally steer you into any neighborhood. Cheers,