When asked to explain why so many urban schools show unsatisfactory results on academic or social measures, principals routinely and quickly turn to descriptions of parents. In other words, when seeking to explain why work within a school is so difficult or why reform initiatives have been unsuccessful, many principals point outside the school.…

The phrases "best practice" and "evidence-based" are much in the air, and they imply that the answers are already out there. We just have to choose the right ones. Educational research in this connection is a kind of product testing. The U.S. Office of Education has made it a policy that rigorous product testing is the only…