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

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

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...

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.

Free Ukrainian 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.

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

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 teaches how to publish a personal website to the public Internet.

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

This online course explores the relation between the EU and the UN. It was created by a consortium of eight universities from seven countries, including the London School of...

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

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

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

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

Free Hungarian 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...

Khan Academy provides various free introductory anatomy video lessons. Topics include the circulatory system, respiratory system, urinary system, hematologic system, immunologic...

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

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