Code Academy

Link: www.codecademy.com/

​Codecademy is the easiest way to learn how to code. It’s interactive, fun, and you can do it with your friends.
Learning with Codecademy will put you on the path to building great websites, games, and apps. Keep tabs on your friends’ progress and make sure you’re learning more - faster! Start learning - and don’t stop. See how fast you’re learning and stay motivated