Only two of the most popular school improvement models for elementary schools have "moderately strong" evidence to show that they work, according to a consumer-style guide released last week by a Washington-based research group. The federally financed report by the American Institutes for Research rates 22 of the most widely used…

A Washington research group is raising questions about the wisdom of the U.S. Department of Education's favored strategies for turning around the lowest-performing schools with stimulus funding, saying that its research shows that similar federal approaches to school restructuring have not been effective. The questions raised by the new study were…