Most discussions of charter schools assume that they are monolithic. While the media, researchers, and policymakers are obsessed with comparing charters to traditional public schools, there's been little interest in comparing different types of charter schools to one another--until now. This study--the first of its kind--categorizes the nation's…

This report contains the typology of charter schools that were sought, based on Carpenter's careful sorting of 1,182 charter schools, representing 87 percent of all those operating in 2001-2002 in the five states (Arizona, California, Florida, Michigan, and Texas) that then accounted for the lion's share of U.S. charter schools. Carpenter sorted…