MOOC Efficiency

Apparently, efficiency in the 21st century is not all that different from efficiency in the 20th century.  From Inside Higher Ed today:

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:

For whatever it means...

Above are the world rankings of universities from the British Times Higher Education magazine based on "academic reputation." [Click on the image to make it clearer.] The full list and info on the survey methodology is at:
http://www.timeshighereducation.co.uk/world-university-rankings/2013/reputation-ranking