Khan Academy

Khan Academy is a non-profit educational organization created in 2006 by educator Salman Khan with a goal of creating a set of online tools that help educate students. The organization produces short lectures in the form of YouTube videos. Its website also includes supplementary practice exercises and materials for educators. All resources are available to users of the website. The website and its content are provided mainly in English, but are also available in other languages, including Spanish, Portuguese, Italian, Russian, Chinese, Turkish, French, Bengali, Hindi, and German.