EdX is a Massive Open Online Course (MOOC) provider, founded in 2012 by MIT and Harvard. It has over 5 million students taking more than 500 courses online. EdX differs from other MOOC providers, such as Coursera and Udacity, in that it is a nonprofit organization and runs on open-source software.
U.Lab is offered through edX, and the course content there is complemented by the interactive and social features here on the Presencing Institute U.Lab site.
For more information about edX, visit edx.org.