Khan Academy: The site famously features K-12 video tutorials created by Sal Khan and team. It currently gives students access to thousands of video tutorials that explain the ins-and-outs of algebra, geometry, trigonometry, calculus, statistics, finance, physics, economics and more. Videos can also be accessed via YouTube and iTunesU, or on the Khan Academy’s website.
cymath :Math problem solver with steps. Our math solver is powered by a combination of artificial intelligence and heuristics, so that it solves math problems step-by-step like a teacher would.
In 2016, we launched our first premium product Cymath Plus, which takes math homework help one step further by providing an ad-free experience along with additional explanations and steps.
instructables.: Get ideas and learn how to make stuff.
4Tests :Take a Free Practice Exam! is a world-wide provider of free, online practice exams. We exist to serve the education and testing markets and we’re proud to help you pass your upcoming exams. Feel free to surf our site, and if you have any questions,
pdfdrive :Search engine for free PDF files and eBooks. PDF Drive is a free search engine which allows you to search, preview and download millions of PDF files into your devices. Our crawlers are constantly scanning the world wide web to add PDF files to our database. In the case that PDF files are withdrawn from the web, then they are also immediately withdrawn from PDF Drive search results. In this way, our PDF Drive library stays up-to-date, while continuously growing and offering you an enormous database to search. In addition to the traditional search engines, PDF Drive has these extra features:
makezine :DIY site for the maker community.
scratch: Online learning community for children.With Scratch, you can program your own interactive stories, games, and animations — and share your creations with others in the online community.
Scratch helps young people learn to think creatively, reason systematically, and work collaboratively — essential skills for life in the 21st century.Scratch is a project of the Lifelong Kindergarten Group at the MIT Media Lab. It is provided free of charge.
duolingo: Learn a new language.
gwikiEasily :remove links from Wikipedia.
openculture:Free cultural and educational media,Open Culture scours the web for the best educational media. He finds the free courses and audio books you need, the language lessons & movies you want, and plenty of enlightenment in between.