Clif's Notes on EdTech

He has also offered five of his courses to anyone on the Web for free; he donates his own time to review nonenrolled students' work, awarding a signed certificate in lieu of course credit. Wiley's most recent open course was formatted as an online role-playing game, with students divided into "guilds" completing "quests" -- a learning community inspired by the world of online gamers. "If you didn't need human interaction and someone to answer your questions, then the library would never have evolved into the university," Wiley says. "We all realize that content is just the first step."

If you want to perform a proper string quartet, they noted, you can't cut out the cellist nor can you squeeze in more performances by playing the music faster. But that was then -- before MP3s and iPods proved just how freely music could flow. Before Google scanned and digitized 7 million books and Wikipedia users created the world's largest encyclopedia. Before YouTube Edu and iTunes U made video and audio lectures by the best professors in the country available for free, and before college students built Facebook into the world's largest social network, changing the way we all share information. Suddenly, it is possible to imagine a new model of education using online resources to serve more students, more cheaply than ever before.