Two Harford County public high schools, Patterson Mill and C. Milton Wright, are part of an elite group of schools nationwide that are included in the "2012 America's Top High Schools" list compiled by The Washington Post.
The high school challenge, known as the "Challenge Index," identifies schools that offer a rigorous instructional program based on high numbers of students taking either Advanced Placement (AP) or International Baccalaureate (IB) tests.
The Challenge Index, which was devised by Post reporter Jay Matthews, divides the number of AP or IB tests taken by all students at a school by the number of graduating seniors. The resulting ratio score is used to rank schools in the survey.
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