Coderbyte - Coderbyte is a place built for anyone to practice and perfect their programming skills.
Free Code Camp - Learn to code by helping nonprofits.
Codecademy - Learn the technical skills you need for the job you want. As leaders in online education and learning to code, we’ve taught over 45 million people using a tested curriculum and an interactive learning environment.
W3Schools - W3Schools is a web developers information website, with tutorials and references on web development...
Scratch - Scratch is the programming language & online community where young people create stories, games, & animations.
Code.org - Code.org is a non-profit whose goal is to expose all students to computer programming.