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What happens to the people who make their livings from teaching, when their jobs are replaced by online courses available for free? All we need is one superb remedial algebra course that can be effectively delivered online and, theoretically, the demand for a zillion remedial algebra courses taught at a zillion community colleges suddenly drops off a cliff. Ask the music business what happens when you can get good stuff for free instead of paying for crap. Daily newspaper journalists learned a similar lesson all too well over the past two decades. The Associated Press business model — licensing the same story to multiple outlets, doesn’t make a whole lot of sense once a single news outlet puts that AP story online for free.

My own daughter is a freshman at a U.C. campus, and has already experienced lectures attended by more than 500 students with sections led by teaching assistants who are utterly uninterested in doing their job. For dollar paid, the value received is questionable, and whenever that kind of situation exists, the status quo is ripe for disruption. (It’s also worth noting, perhaps, that over 60,000 students applied for spots in a freshman class that ended up enrolling only 4,500 applicants, a sign, I think, that the brick-and-mortar university is in no imminent danger of going the way of the dinosaur.)

Education, I’d argue, has always been the most likely sector of society to get transformed by the Internet, because the thing the Internet does better than anything else is distribute information.

Technology will never replace the teacher, but technology necessitates that educators redefine our concept of teaching and learning in an era where anyone with Internet can teach and learn. Many will benefit from these readily accessible videos, but videos can only go so far.