As Test Scores Jump, Raleigh Credits Integration by Income - New York Times: "The main reason for the students' dramatic improvement, say officials and parents in the county, which includes Raleigh and its sprawling suburbs, is that the district has made a concerted effort to integrate the schools economically.
Since 2000, school officials have used income as a prime factor in assigning students to schools, with the goal of limiting the proportion of low-income students in any school to no more than 40 percent.
The effort is the most ambitious in the country to create economically diverse public schools, and it is the most successful, according to several independent experts. La Crosse, Wis.; St. Lucie County, Fla.; San Francisco; Cambridge, Mass.; and Charlotte-Mecklenburg, N.C., have adopted economic integration plans."