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

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 gives an introduction to artificial intelligence and deep learning for programmers.

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

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

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

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

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

This online course teaches how to publish a personal website to the public Internet.

This online course teaches intermediate techniques to transform table data in SQL.

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 course teaches how to program in C#, which is used for programming mobile applications, games and enterprise software.

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

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

This course teaches how to style websites with CSS.

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

Khan Academy provides various free introductory video lessons on electrical engineering. Topics include circuit analysis, amplifiers, semiconductors, electrostatics, signals and...

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.

This online course teaches how to create websites by structuring the pages with HTML.The course is designed for beginners and includes HTML elements and structures as well as...

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