Rod Gammon's Educational Resource List

http://www.americanprogress.org/issues/2011/01/educational_productivity/
By the "Center for American Progress". From the website: "...we've attempted to evaluate the return on investment (ROI) of almost every major school district in the country. By productivity, we mean how much learning a district produces for every dollar spent, after controlling for factors such as cost of living and students in poverty. "