Describes the program, framework and design for the national evaluation, and data and methods to be used in the implementation and impact studies.

This article uses data from Ohio, a state that allows a wide range of organizations to authorize charter schools, to examine the relationship between type of authorizer and charter-school effectiveness.

This paper uses individual student-level data from Ohio–which permits a wide range of organizations to authorize charter schools—to examine the relationship between type of authorizer and charter-school effectiveness, as measured by students’ achievement trajectories.