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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 includes various free introductory history video lessons. Topics include:The beginnings and the neolithic revolution; Ancient civilizations in...

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...

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

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

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.

This course teaches how to program in R, which is a popular language used by data scientists and researchers.

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

This course teaches how to build web apps using AngularJS 1.x, enabling learners to use AngularJS to create their own apps.

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

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

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

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

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

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

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,...

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

This course teaches how to style websites with CSS.

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