Joseph Pereira:

Last spring, town officials in this affluent Boston suburb changed the elementary-school assignments for 38 streets — and sparked outrage. Some white families had been reassigned to Tucker, a mostly black school which has historically had Milton’s lowest test scores.
Among those reassigned is Kevin Keating, a white parent who is talking to lawyers about going to court to reverse the plan. I “just don’t feel good putting [my son] in an inferior school,” he says. His ammunition: the U.S. Supreme Court’s June ruling that consideration of race in school assignments is unconstitutional. Without the backing of the Supreme Court, Mr. Keating says his effort wouldn’t have “much of a standing.”
Five decades ago, federal courts began forcing reluctant districts to use race-based assignments to integrate schools. But in June, a bitterly divided Supreme Court reversed course, concluding that two race-based enrollment plans in Louisville, Ky., and Seattle were unconstitutional. “The way to stop discrimination on the basis of race is to stop discriminating on the basis of race,” Chief Justice John Roberts declared.
Now, in an era when schools nationwide are becoming increasingly segregated, the ruling is affecting local school districts in ways large and small. Some districts are sidestepping the ruling by replacing measurements of race with household income. But many others, such as Milton, are adjusting their programs in the face of opposition that’s been emboldened by the Supreme Court decision.
In Georgia, the Bibb County School District, which encompasses Macon, has decided to abandon a balancing plan between whites and minorities at one of its top magnet schools next year. A broader school-board redistricting plan aimed at promoting integration is facing a host of opposition, including a threat of legal action by a lawyer citing the Supreme Court decision.