Educational Tools

Hello! This is a list of some of the best educational tools/sites found on the internet.

Feel free to enjoy any and all of them, and please, if you know of any more sites that might be beneficial to add here, please add it! This is a community list.

khanacademy.org - Watch thousands of micro-lectures on topics ranging from history and medicine to chemistry and computer science!
freerice.com - Help end world hunger by correctly answering multiple-choice quizzes on a wide variety of subjects!
unplugthetv.com - Randomly selects an educational video to watch instead of useless drivel.
coursera.org - Educational site that works with universities to get their courses on the internet, free for you to use!
lizardpoint.com - A collection of browser-based games and the like to improve knowledge of geography, math, and such.
ted.com - Collection of TED (Technology, Entertainment and Design) talks in which knowledgable speakers address a variety of topics in short videos (< 18 minutes)
mathrun.net - Practice your basic math skills with a simple game
justinguitar.com - Hundreds of free guitar lessons as well as some basic music theory.
duolingo.com - Learn a new language for free while helping to translate the web!
memrise.com - Learn things quickly and efficiently with flashcards that are spaced based on the spacing effect
cookingforengineers.com - A site containing one man's explorations in food, with step by step instructions for making a wide variety of dishes.
mentalfloss.com - Articles meant to expose you to interesting info, whether to "make you smile" or to really get you thinking.
openculture.com - Compendium of free learning resources, including courses, textbooks, and videos/films.
ocw.mit.edu - Free access to quite a few MIT courses that are on par with what you'd expect from MIT.
investopedia.com - Learn about the world of finance, from basic terminology to in depth analysis of various areas of investing.
udacity.com - Free courses mainly focused around mathematics and programming. Aimed at people of all skill levels.
lang-8.com - Write posts in a language you're trying to learn, get them critiqued by a native speaker (and in turn help that native speaker learn your language)!
engineerguy.com - Collection of videos in which Bill breaks down various feats of engineering in layman's terms.
zooniverse.org - Take part in investigating various interesting studies of nature, science, and culture.
aldaily.com - Aggregation of articles from various higher education journals and publications.
livemocha.com - Community dedicated to the idea of everyone being fluent in multiple languages, teach or be taught another language with the goal of conversational fluency.
simplesciencefitness.com - Breaking down the science behind fitness into layman's terms.
edx.org - EdX is a not-for-profit enterprise of its founding partners Harvard University and the Massachusetts Institute of Technology that features learning designed specifically for interactive study via the web.
learnerstv.com - Video lectures of many subjects: Math, Business, History, Philosophy and more.
academicearth.org - Compilation of video lectures from different collegiate sources.
cnx.org/content - A huge database of content covering Arts, Business, Humanities, Math, Science and Social Sciences created by users, professors, and universities.
nature.com/scitable - Learn biology and genetics through free ebooks and hundreds of articles covering several topics.
ureddit.com - Classes taught by regular people with expertise in the field. Not accredited professors or lecturers, which may not necessarily be a bad thing.
uopeople.org - Tuition free online university.