Among all in-school factors that impact student learning, teachers carry the most weight -- but school leaders are not far behind. Decades of research have proven the positive influence principals can have on student achievement, school climate and teaching quality. New evidence suggests that their impact may be even greater than previously…

Policy makers at the federal level have embraced an educator effectiveness agenda, which in turn has driven many states across the country to rapidly develop and implement new and more complex teacher evaluation systems. It is increasingly clear that the success of these nascent teacher evaluation systems partly depends on the will, skill and…

Policy makers at the federal level have embraced an educator effectiveness agenda, which in turn has driven many states across the country to rapidly develop and implement new and more complex teacher evaluation systems. It is increasingly clear that the success of these nascent teacher evaluation systems partly depends on the will, skill, and…