For as long as there have been struggling schools in America's cities, there have been efforts to turn them around. But overall, school turnaround efforts have consistently fallen far short of hopes and expectations. Quite simply, turnarounds are not a scalable strategy for fixing America's troubled urban school systems. Fortunately, findings from…

The big battles over school vouchers in American education have focused on programs serving low-income children who live in urban areas. Milwaukee's program, begun in 1990, is the biggest and oldest in the country, and the District of Columbia effort, funded by the federal government, has been the most carefully studied. Both have been focal…