2Flipping the classroom:hopes that the internet can im- prove teaching may at last be bearing fruit.Sep 17th,2011.http: //www.economist.com/node/21529062.
3Key questions you should ask before you flip your class.April 15,2013.http://flipped-learning.com/?p= 1268.
4Brown M.Moving into the post-MOOC era[OL].<http://www.educause.edufologs/mbbrown/moving-post-mooc-era.>.
