By Jack Hidary
"New online learning models are bursting from startups and top universities, bridging the educational divide.
"We are in the midst of a revolution that will bring high-quality education to hundreds of millions of people who have never had access to this level of learning before.
"These tools will reach those in developing cities and countries but also foment a revolution in the U.S. classroom as they change our perception of what learning can be.
"Here are the leading new platfoms disupting the education world:"