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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,...

This online video lecture series discusses advanced topics related to algorithms in computer science.

This series of online courses explores the fundamental building blocks of computer science, including programming, development, algorithms, and data structures. The program...

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,...

This online lecture explores the dynamics of evolution, including various mathematical models.

In this online course, the world´s #1 women´s tennis player Serena Williams teaches everything from core techniques to fitness drills and improving the mental game. The course...

This online lecture discusses nonlinear dynamics and control of underactuated mechanical systems, with an emphasis on machine learning methods.

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

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

This course teaches how to program in PHP, which is one of the most popular languages of modern web development.

This series of lectures gives an introduction to the mechanics of spaceflight.

This online lecture series explores the history of WWI.

This online video lecture series gives an introduction to political economy.

This online lecture covers social development, social behaviour, social cognition and social neuroscience, in both human and non-human social animals.

In this online course, Michelin star-holding chef Thomas Keller teaches cooking. The course includes more than 30 video lessons and various supplemental materials.

The purpose of this online lecture is to expose undergraduate and graduate students to the mathematical concepts and techniques used in the financial industry.

Die Online-Kurse der KhanAcademy geben eine erste Einführung in die Programmierung für Anfänger. Enthalten sind die Sprachen JavaScript, HTML, CSS und SQL.

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

This video lecture gives an introduction to project and quality management in software systems engineering.

These short online courses provided by Skillshare cover various topics around creative writing, including creative fiction and non-fiction, screenwriting, ebooks, editorial...