Originally Posted by indigo
Ranking America's High Schools - The Washington Post
http://apps.washingtonpost.com/local/highschoolchallenge/
It's not a meaningful ranking, because it ignores how many students get passing scores on those tests:

Quote
America’s Most Challenging High Schools ranks schools through an index formula that’s a simple ratio: the number of Advanced Placement, International Baccalaureate and Advanced International Certificate of Education tests given at a school each year, divided by the number of seniors who graduated that year.
The Challenge Index has been debunked in a post Jay Mathews gets it wrong again.