Datacamp!

Codecademy is the easiest way to learn how to code. It's interactive, fun, and you can do it with your friends.

Khan Academy is not-for-profit with the goal of changing education for the better by providing a free world-class education to anyone anywhere.

We are committed to making the best education in the world freely available to any person who seeks it. We envision people throughout the world, in both developed and developing countries, using our platform to get access to world-leading education that has so far been available only to a tiny few. We see them using this education to improve their lives, the lives of their families, and the communities they live in.

With more than 20 000 courses thousands of experts teach on Udemy including New York Times best-selling authors, CEOs, Ivy League professors and celebrity instructors. These experts teach more than 4 millions students through Udemy’s smart online course platform that incorporates video, live lectures, and tools to help them interact with students and track their progress. Many instructors are earning a full-time living through Udemy course sales. Founded in February 2010, Udemy is backed by the people who helped create YouTube, Twitter, LinkedIn, Groupon and Yelp. »

Online university-level technical courses. We believe university-level education can be both high quality and low cost. Using the economics of the Internet, we've connected some of the greatest teachers to hundreds of thousands of students all over the world.

The problem with online education

Try R is an online course created by Code School to learn R (programming language) interactively.