Making the Grade: Online Education in the United States, 2006
http://www.sloan-c.org/publications/survey/index.asp

Making the Grade: Online Education in the United States, 2006 is based on data collected for the fourth annual national report on the state of online education in U.S. higher education. Supported by the Alfred P. Sloan Foundation and conducted by the Babson Survey Research Group in partnership with the College Board, the report, based on responses from over 2,200 colleges and universities, examines the nature and extent of online learning among U.S. higher education institutions. This will be added to Education and Distance Learning Resources Internet MiniGuide.