Valerie Strauss:

Many people paying attention to corporate-based school reform in recent years will not be surprised by this, but a new study on the effects of this movement in Washington, D.C., New York City and Chicago concludes that little has been accomplished and some harm has been done to students, especially the underprivileged.
The report looks at the impact of reforms that have been championed by Education Secretary Arne Duncan and other well-known reformers, including Michelle Rhee, the former chancellor of D.C. Public Schools, and, in New York City, Joel Klein, the former chancellor of New York City Public Schools and Mayor Michael Bloomberg. It says: