Networks of intermediary organizations (IONs) are penetrating the education policy space with a range of ideas and “evidence,” brokering knowledge to policy actors and the public at large. Increasingly, we are observing IOs gaining traction as key players in advocacy and policymaking in the U.S. public education sector around tenuous reforms such as charter schools, merit pay, vouchers, and Parent Trigger. Operating in a myriad of forms, IONs often include a mix of the “big three” foundations (i.e. Gates, Walton, Broad), advocacy groups, think tanks, academic research networks, policy groups, and journalists. Several articles from our research study on evidence use among IOs and policymakers give empirical accounts of this phenomenon at the national and local levels in Denver, New York City, and New Orleans (see Further Reading).