Methodology: America's Best High Schools

The 2010 U.S.News & World Report Americas Best High Schools methodology, developed by School Evaluation Services, a K-12 education data research business run by Standard & Poor's, is based on the key principles that a great high school must serve all its students well, not just those who are collegebound, and that it must be able to produce measurable academic outcomes to show the school is successfully educating its student body across a range of performance indicators.

We analyzed 21,786 public high schools in 48 states plus the District of Columbia. This is the total number of public high schools that had 12th-grade enrollment and sufficient data, primarily from the 2007-2008 school year, to analyze. (Nebraska and Oklahoma did not provide full data. Their schools were evaluated for honorable mention, but none met the criteria.)

A three-step process determined the best high schools. The first two steps ensured that the schools serve all their students well, using state proficiency standards as the benchmarks. For those schools that made it past the first two steps, a third step assessed the degree to which schools prepare students for college-level work.

Test performance. The first step determined whether each school's students were performing better than statistically expected for the average student in the state. We started by looking at reading and math results for all students on each state's high school test. We then factored in the percentage of economically disadvantaged students (who tend to score lower) enrolled at the school to identify the schools that were performing better than statistical expectations.

For those schools that made it past this first step, the second step determined whether the school's least-advantaged students (black, Hispanic, and low income) were performing better than average for similar students in the state. We compared each school's math and reading proficiency rates for disadvantaged students with the statewide results for these student groups and then selected schools that were performing better than this state average.

Schools that made it through the first two steps became eligible to be judged nationally on the final step, college-readiness performance, using Advanced Placement and International Baccalaureate test data as the benchmarks for success, depending on which program was largest at the school. AP is a College Board program that offers college-level courses at high schools across the country. The International Baccalaureate program also offers a college-level curriculum. This third step measured which schools produced the best college-level achievement for the highest percentages of their students. This was done by computing a "college readiness index" based on the school's AP or IB participation rate (the number of 12th-grade students who took at least one AP or IB test before or during their senior year, divided by the number of 12th graders) and how well the students did on those tests. The latter part, called quality-adjusted AP or IB participation, is the number of 12th-grade students who took and passed (received an AP score of 3 or higher or an IB score of 4 or higher) at least one of the tests before or during their senior year, divided by the number of 12th graders at that school. For the college readiness index, the quality-adjusted participation rate was weighted 75 percent in the calculation, and 25 percent of the weight was placed on the simple AP or IB participation rate. Only schools that had values greater than 20 in their college readiness index scored high enough to meet this criterion for gold and silver medal selection. The minimum of 20 was used because it represents what it would take to have a "critical mass" of students gaining access to college-level coursework.

The top 100 high schools nationwide with the highest college readiness index scores were ranked numerically (ties were broken using first the participant passing rate and then the average number of AP and/or IB exams passed per test taker) and awarded gold medals. The next 461 top-performing high schools nationwide—based on their college readiness index scores—earned silver medals. An additional 1,189 high schools in 48 states plus the District of Columbia that passed the first two steps were awarded bronze medals. Thirty-seven more high schools in 12 states received an honorable mention medal if they would have scored high enough on the college readiness index to earn a gold medal but didn't fully meet Step 1 and Step 2.

Analysts from School Evaluation Services developed the methodology and compiled the analysis. AP is a trademark owned by the College Board, which was not involved in the production of and does not endorse this product.