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This course teaches how to program in Ruby, a flexible language used to create many websites.

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

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

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

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...

Comprehensive language course in Arabic. The idea of this course is to learn the language "like a native". This means that the course creates an immersive learning experience...

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

Comprehensive language course in Persian. The idea of this course is to learn the language "like a native". This means that the course creates an immersive learning experience...

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

In this online course, Herbie Hancock teaches how to improvise and compose Jazz. The course includes more than 20 video lessons and various supplemental materials.

In this online course, star photographer Annie Leibovitz teaches key photography skills. The course explores topics such as:The technical side of photography, including the role...

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

This online course teaches more advanced concepts in Android, like using threads and services for background work, sharing data with intents and broadcast receivers, and proper...

Comprehensive language course in Italian. The idea of this course is to learn the language "like a native". This means that the course creates an immersive learning experience...

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

Extensive Mandarin language course, also suitable for beginners. Learn with videos from native speakers with subtitles in English and Mandarin. Easy handling and rewinding of...

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

In this online course, Usher teaches the art of performing in front of an audience. The course includes ca. 15 video lessons and various supplemental materials.

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,...

Comprehensive language course in Spanish. The idea of this course is to learn the language "like a native". This means that the course creates an immersive learning experience...