Every year, Newsweek publishes it's list of the top High Schools in the country. Their formula is based on the number of Advanced Placement Tests taken by all students at a high school divided by the number of graduating seniors.
Only a few Pennsylvania schools made this year's list of the top 1500 schools. Radnor and Conestoga are on the list.
Great Valley is not.
Judge for yourself. Here is the link to the article in Newsweek:
http://www.newsweek.com/id/201160/?q=2009/state/1101
June 2009