In this Aug. 2, 2012 photo, Andrew Ng and Daphne Koller, Stanford University computer science professors who started Coursera, pose for a photo at the Coursera office in Mountain View,

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In this Aug. 2, 2012 photo, Andrew Ng and Daphne Koller, Stanford University computer science professors who started Coursera, pose for a photo at the Coursera office in Mountain View, Calif. This month Coursera announced that a dozen top research campuses have joined Stanford and Princeton universities in offering online courses through its online platform. (AP Photo/Jeff Chiu) less