Teachers have the greatest school-based effect on the achievement of any child in their classrooms, but highly effective principals can positively affect the achievement of every student in their schools. The difference between a highly effective principal and an average one is equal to two-to-seven months of extra learning per year for each child…

Over the past decade, Montgomery County Public Schools (MCPS) in Maryland has focused on improving teacher capacity as a strategy to address achievement gaps and promote "college-ready" standards in what has become an "urban suburb" with significant pockets of high-need students. As part of this focus on quality teaching, the…

Teachers in the second stages of their careers--those with 4-10 years of experience--are often eager to vary their responsibilities, work collaboratively with peers, and influence teaching beyond their own classrooms. With many veteran teachers retiring, principals are apt to recruit these second-stage teachers to fill teacher leadership…

For more than 10 years, the education community has watched the corporate ups and downs of Edison Schools Inc., the New York City company that has created controversy with its aim of making money from public schools. Long a target of those wary of such aims, the now privately held Edison made headlines with its four-year run as a public company,…