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Khan Academy provides various free introductory macroeconomics video lessons. Topics include national income and the GDP, inflation, demand and supply, business cycles, the...

This course teaches how to add sign up, log in, and log out functionality to Rails apps, as well as how to manage access to specific pages.

Free Danish language app with many short tests to learn "on the go". (Not a video course.)

Khan Academy provides various free introductory mathematics video lessons. Topics include elementary math, algebra, geometry, calculus, trigonometry, differential equations,...

This online course teaches how to build powerful interactive applications with this popular JavaScript library. React is an open source library developed by Facebook.

Khan Academy provides various free lessons for learners who prepare for the MCAT test.

This online course explores the fundamentals of JavaScript, the programming language of the Web.The course was designed for learners who have some knowledge of HTML and CSS and...

This online course introduces learners to the basics of Lua, a general-purpose programming language used for building games, web apps, and developer tools.

Khan Academy provides various free introductory biology video lessons. Topics include acids and bases, properties of carbon, macromolecules, energy / metabolism, enzymes, cell...

This online course teaches the fundamental concepts of Blockchain and how to implement them in Python. Learners with prior Python experience will be able to build their own...

Free Ukrainian language app with many short tests to learn "on the go". (Not a video course.)

Free Russian language app with many short tests to learn "on the go". (Not a video course.)

This collection of YouTube playlists provides an introduction to car technology for beginners. It includes several video lists on topics such as car engines, engine components,...

Khan Academy provides various free introductory chemistry video lessons. Topics include atoms and compounds, chemical reactions, the periodic table, chemical bonds,...

These online lessons explain the basics of cross sections in anatomy. In addition to the free video lessons, further (paid) trainings are available.

This course teaches how to program in Go (Golang), an open-source programming language supported by Google.

Khan Academy provides various free introductory video lessons on astronomy and cosmology. Topics include the scale of the universe, the Big Bang, stars, black holes, galaxies,...

These online lessons explain the basics of spine and back anatomy. In addition to the free video lessons, further (paid) trainings are available.

This course teaches how to build four webpages from scratch while learning web development fundamentals.

Khan Academy provides various free introductory anatomy video lessons. Topics include the circulatory system, respiratory system, urinary system, hematologic system, immunologic...