Khan Academy is an non-profit educational organization created in 2008 by Sal Khan, with the goal of creating a set of online tools that help educate students. The organization produces short lessons in the form of videos.
You can learn for free about variety of topics including math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history and more.
Code.org has been built with the target to help you and students of all ages learn and understand computer science. They have been globally renowned for their Hour of Code initiative.
You can learn 30+ languages online on Duolingo, using the free mobile app or website by spending a few minutes a day, with highly effective bite-size lessons.
YouTube is unbeatable with its huge library of educational videos.
Click here to visit the site’s education portal where you can find curated playlists including content from the likes of National Geographic.
As the former engineer at Apple and previously working on the Curiosity Rover at Nasa, Mark Rober is well versed in various fields in both science and engineering. You can find fun and educational videos on his channel.
Derek Alexander Muller is an Australian-Canadian scientist & filmmaker, is globally renowned for his channel Veritasium. You can explore about science, education and many other interesting topics on this channel.
TEDEd has a growing library of TED-Ed animations, where you will find carefully curated educational videos. Their commitment towards creating lessons worth sharing is an extension of TED’s mission of spreading great ideas.
Skillshare is an online learning platform focused mostly towards creative courses. The majority of courses on this site focus on interaction rather than lecturing, with the primary goal of learning by completing a project.
Coursera works with universities and other organizations to offer online courses, certifications, and degrees in a variety of topics. They also offer courses from leading companies like Google and IBM. You can audit most of the courses free of charge.