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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 introduces microeconomic concepts and analysis, supply and demand analysis, theories of the firm and individual behavior, competition and monopoly, and...

Effective field theory is a fundamental framework to describe physical systems with quantum field theory.

This course provides a selection of individual lessons and analyses from experts on the 2020 corona virus outbreak. It includes topics such as an epidemic overview, fatality...

This online course teaches the fundamental concepts of Blockchain and how to implement them in Python. Learners with prior Python experience will be able to build their own...

This lecture complements (and builds on top of) the lectures "Introduction to Pattern Recognition" and "Pattern Recognition". The lecture focusses on modeling of densities, and...

This online course gives an overview of Roman Architecture through a series of 23 online lectures. The course provides an introduction to the great buildings and engineering...

This online lecture series explores how algorithmic puzzles can be solved with computer programming, using the Python programming language.

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

Comprehensive language course in Hebrew. The idea of this course is to learn the language "like a native". This means that the course creates an immersive learning experience...

Comprehensive language course in Irish. The idea of this course is to learn the language "like a native". This means that the course creates an immersive learning experience...

This online course teaches the JavaScript language, jQuery, the JavaScript framework and the ins-and-outs of adding interactivity in the browser.

This online lecture series presents the Early Middle Ages in Western European development, from the accession of Diocletian to the feudal transformation. It covers topics such...

These short online courses provided by Skillshare cover various topics around photography, including digital photography, DSLR, portrait photography, composition, retouching,...

This series of online lectures explores the physical and social form of cities. It covers theories about the form that settlements should take and attempts a distinction between...

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

This online course teaches how to program in Python, a powerful and popular programming language. Many students learn Python as their first programming language.

This online lecture deals primarily with equilibrium properties of macroscopic systems, basic thermodynamics, chemical equilibrium of reactions in gas and solution phase, and...

This course teaches how to program in C++, which is a language well-respected for its flexibility and low-level functionality. It is used in the development of operating...

This course teaches how to build web apps with Ruby on Rails 4, giving learners the skills to use Ruby on Rails to create their own apps.