W3Schools Online Web Tutorials https://www.w3schools.com/
Codecademy https://www.codecademy.com/
The Code Player https://thecodeplayer.com/
Learn web development https://developer.mozilla.org/en-US/docs/Learn
Web Fundamentals https://developers.google.com/web
MIT Open Courses Ware https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/
Develop PHP http://www.developphp.com/
HOW TO CODE https://howtocode.io/
Bento Box https://bento.io/
Academic Earth https://academicearth.org/
Dev Opera https://dev.opera.com/
Codepen https://codepen.io/
Computer programming https://www.khanacademy.org/computing/computer-programming
Coder Dojo https://coderdojo.com/
Koding https://www.koding.com/