1. Ritter, G. 2006. Secondary analysis of "Segregation levels in Cleveland public schools and the Cleveland voucher program," report from The Friedman Foundation and the Buckeye Institute. Tempe, AZ: Education Policy Research Unit, Think Tank Review Project. http://epsl.asu.edu/epru/ttreviews/EPSL-0610-213-EPRU.pdf
2. Standard and Poor's. 2004. School evaluation services. http://www2.standardandpoors.com
3. Trotter, A. 2006. Bush's forest proposal worries rural schools. Education Week, February 22, 2006.
4. U. S. Department of Education. 2007. Building on results: A blueprint for strengthening the No Child Left Behind Act. Washington, DC: Department of Education.
5. Winter, G. 2004. Financial gap is widening between rich and poor schools. New York Times, October 6.