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…

Drawing on lessons learned from Wallace-funded research and state-district work in strengthening education leadership, the foundation has produced a paper that discusses the potential as well as the challenges of an emerging concept of leadership called a "Cohesive Leadership System." This cohesive leadership system holds potential for…