Integrating our schools is a goal that many of us share. But some seem to have given up on the idea, as plans to boost racial diversity have come under attack, and as the fixation on test scores has narrowed some people's concept of a good education. There is, however, new hope: integration by socioeconomic status. It's a cost-effective, legally…

In late 1999, philanthropist Susie Buffett wanted to make the smartest possible investment to improve public education in her hometown of Omaha, Nebraska. She and her then-foundation president, Dan Pedersen, spoke with Superintendent John Mackiel regarding how he would choose to use private funds to enhance opportunities for Omaha's 46,000…