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

This online course gives an introduction to the C programming language. C is one of the foundational languages of computer science, for example used in operating systems. The...

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

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

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

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.

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

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

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

This online course (MOOC) explores gender identity and the gender spectrum by analyzing the real-life experiences of six transgender children and their families.

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

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

Khan Academy provides various free introductory programming video lessons. Topics include JavaScript, HTML and CSS, SQL, and more.

Khan Academy provides various free introductory video lessons on health and medicine. Topics include human anatomy and physiology, circulatory system diseases, mental health,...

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

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

This online course (part 2 of 2 courses) teaches how to build powerful interactive applications with this popular JavaScript library. React is an open source library developed...

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

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

This online language teaching method/app includes various languages, such as a German, English, Spanish, French, and Italian language course, and more.