But over the last few years, the Bloomberg approach has been vindicated by an innovative, multiyear study showing that the poor, minority students who attend small specialized schools do better academically
than students in a control group who attend traditional high schools.
In 2010, the U.S. Department of Education found that students who were offered a voucher in the Washington, D.C., voucher lottery graduated high school at a rate 12 percentage points higher
than students in the control group.