Teachers want to succeed, but they typically lack the conditions for success. Teachers generally work in isolation. They're on their own to adjust practice to better serve students. What guidance they get often is plagued by vague teaching standards, overly numerous and often trivial learning objectives, and testing systems that measure only some…

In fall 2009, the Bill & Melinda Gates Foundation launched the Measures of Effective Teaching (MET) project to develop and test multiple measures of teacher effectiveness. The goal of the MET project is to improve the quality of information about teaching effectiveness available to education professionals within states and districts--information…