Some students taking free classes from Coursera may never know the right answers. A University of Michigan professor teaching one of the company's massive open online courses, or MOOCs, told students this week he could not provide them with correct answers to questions they get wrong because doing so would reduce efficiency...
Full story at http://www.insidehighered.com/news/2013/07/05/one-mooc-professor-wont-let-students-know-right-answers
Yours truly is sure it's just a temporary glitch that can be easily remedied with the right technology as demonstrated in the last century:
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