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Harvard Professor’s YouTube Lectures Upgraded on IPad

Professor Michael Sandel’s lectures on justice, part of some of Harvard University’s most popular courses, are also a hit on YouTube, viewed millions of times with thousands of comments.

Unlike the students in his class who actively participate in discussions, the online audience can do little more than sit there and watch. That’s about to change, thanks to a three-year-old startup based in San Francisco, reported on its Tech Deals blog.