"This new report reinforces that effective teachers need to incorporate digital content into everyday classes and consider open-source learning management systems, which have proven cost effective in school districts and colleges nationwide," said U.S. Secretary of Education Arne Duncan, in a statement released to coincide with the publication of the report. "We must take advantage of this historic opportunity to use American Recovery and Reinvestment Act funds to bring broadband access and online learning to more communities."
This is a study that discuss blended vs online. some research indicates blended is more effective.