How schools are ranked:
The formula is simple: Divide the number of Advanced Placement, International Baccalaureate or other college-level tests a school gave in 2010 by the number of graduating seniors.Edgemont High School is ranked 197 in the country, which is not surprising given the high socioeconomic status of its students.
What is surprising - what is astonishing, really - is Edgemont's "Equity and Excellence" score, which gives the percent of graduating seniors who have scored a 3, 4, or 5 on at least one AP exam by graduation: 86.6% of Edgemont's graduating seniors passed at least one AP test.*
Can that possibly be true?
I assume it can, given that Rye and Chappaqua have reported similar scores now or in the recent past.
Their figures over the past several years are very high compared to the percent most schools - including most affluent suburban schools - post.
*IB scores count, too, but I don't think Edgemont has IB courses.