New Studies Explore the Secrets of Principals' Success

"Everybody says principals make a difference, but there's really been no systematic effort to try to estimate the extent to which they make a difference, how they make a difference, and how they're distributed across schools," says Jane Hannaway, head of the Urban Institute's National Center for Analysis of Longitudinal Data in Education Research (CALDER), which is publishing a new collection of working papers on the subject. Read summaries of the studies in Ed Week.