AppleTree Institute for Education Innovation, a nonprofit organization in Washington, D.C., is working to close the achievement gap before children enter kindergarten by providing 3- and 4-year-olds with the social, emotional, and academic foundations that enable them to thrive in school--and increasing educator effectiveness is a critical…

While most principal supervisors are former principals themselves, few come to the role with specific training in how to do the job effectively. For this reason, both the Washington, D.C., and Tulsa, Oklahoma, principal supervisor programs include a strong professional development component. In this article, the author takes a look inside these…