![Richard Baraniuk: The birth of the open-source learning revolution](https://pi.tedcdn.com/r/pe.tedcdn.com/images/ted/228_480x360.jpg?h=200)
In 2006, open-learning visionary Richard Baraniuk explains the vision behind Connexions (now called OpenStax), an open-source, online education system. It cuts out the textbook, allowing teachers to share and modify course materials freely, anywhere in the world.