Those aren't America's best schools! Check out #13, the IDEA Quest Academy in Donna, Texas, with 96% minority, 77% economically disadvantaged student body. Now that has to be considered a real success by comparison. The best schools are those that take on the challenges of its culture by including all those who struggle and devote resources to meeting the needs of all children. The best don't hide from the disadvantaged, but find ways to help everyone reach their potential in an atmosphere of collaboration and mutual respect.
Whenever some polling body decides to rank anything so difficult as America's high schools, I don't get overly excited about it. Usually they have some over riding or vested interest in the outcome. I seriously doubt that the lists would look anything alike if it were done by, say, the U.N. or the International Peace Institute.