In the South in 1968, 19 percent of black children attended mixed schools where more than half of the students were minority students. By 1980, 42.9 percent did. In the Northeast, by contrast, in 1968, 33.2 percent of black children attended mixed schools. In 1980, 20 percent did. Many white children moved to the suburbs where fewer blacks and other minorities lived and the government made less of an effort to desegregate schools. Even as schools in the South were desegregated, schools in the Northeast became more segregated, not less.

Source:

Jennifer Hochschild, The New American Dilemma (New Haven: Yale University Press, 1984).