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This online course teaches how to use color effectively to create attractive and useable websites.

Free Russian 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 MCAT test.

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

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

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

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

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

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

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

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

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

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 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 introductory physics video lessons. Topics include velocity and acceleration, forces and Newton's laws of motion, gravitation, energy,...

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

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

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