University of Virginia history professor Philip Zelikow has taught the course, "The Modern World: Global History Since 1760" for 16 years -- but this semester is different. Instead of delivering it to 120 students on campus, he'll be teaching 42,000 students around the world.

http://dailynightly.nbcnews.com/_news/2013/01/31/16795195-massive-open-online-classes-raise-questions-about-future-of-educ...

Teachers Get Ready for Tens of Thousands of Students in Online Courses

https://news.virginia.edu/content/teachers-get-ready-tens-thousands-students-online-courses