A little more than a year has passed since the U.S. Supreme Court issued its splintered decision in Parents Involved in Community Schools v. Seattle School District, striking down two voluntary racial integration plans used by the public school systems in Seattle and Louisville. The court’s rejection of the voluntary use of race in assigning students to the nation’s public elementary and secondary schools prompted a heated debate among legal scholars and educators, leaving school districts struggling to make sense of the emotionally charged, 5-4 ruling....