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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,...

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

Khan Academy provides various free introductory video lessons on the history of the United States.

This online course gives an introduction to Alexa, the Voice User Interface (VUI) application by Amazon.The course shows how to build a simple interaction model that responds to...

This course shows the basics of SQL data analysis to explore dips and spikes in data and build business metrics.

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

This course teaches how MOS transistors work, and how to model them. The understanding provided in this course is essential not only for device modelers, but also for designers...

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

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

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

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

This online course gives an introduction to Kotlin, a popular programming language for Android development, web development, and more.

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 chemistry video lessons. Topics include atoms and compounds, chemical reactions, the periodic table, chemical bonds,...

Free Hungarian 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 online course teaches how to build powerful interactive applications with this popular JavaScript library. React is an open source library developed by Facebook.

This online course teaches how to manage data with SQL, including mastering complex commands to manipulate and query data stored in relational databases. It includes topics such...

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

This online course gives a free introduction to digital currencies such as Bitcoin. It is also the first course of an online master's program in digital currencies from the...