https://www.edx.org/(edx)
https://www.udacity.com/ (Udacity)
https://www.coursera.org/ (Coursera)
http://c.open.163.com/coursera/home.htm#/courseraHome (网易公开课)
http://video.jingpinke.com/(国家精品课程资源网)
http://opencla.cntv.cn/(中国公开课)
http://www.icourses.cn/home/(爱课程)
http://www.oer.edu.cn/(中国教育在线)