President Michael Roth discussed "The Future of Education" at the 92nd Street Y's Social Good Summit on Sept. 21. The event is the focus of his popular MOOC on the Coursera platform, which will be offered again starting in Nov., 2014. In his second appearance at the annual two-day festival of ideas, Roth discussed why education is still the best vehicle for social change, even while it has become more controversial then ever. Watch the video of his talk. "Education remains the most potent tool for changing the world, " he said. "And training teachers who can help students acquire the…