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This online lecture series gives an introduction to nuclear and particle physics.

This video lecture discusses the computational complexity theory, including the Chomsky hierarchy, (un-) decidability,SPACE versus TIME, EXPSPACE and more advanced topics.

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

This online video lecture series gives an introduction to Computer Science, Internet technology and the basics of computer hardware (CS105 class at Stanford University). The...

This online course explores what cities and users can do to reduce their energy use and carbon emissions.

This course offers a series of lectures on parallel programming concepts as well as a group project providing hands-on experience with parallel programming.

This online video lecture series gives an introduction to optoelectronics.

This series of online courses explains the role of testing in web development. Participants will build a testing suite for a full-stack web application.

This calculus lecture covers differentiation and integration of functions of one variable, and concludes with a brief discussion of infinite series.

This series of video lectures explores various technologies involved in building distributed, data-intensive systems.

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

This course explores the causes, course, and consequences of the American Civil War, from the 1840s to 1877.

This course provides an overview of major works of social thought from the beginning of the modern era through the 1920s.Writers include Hobbes, Locke, Rousseau, Montesquieu,...

This advanced-level online lecture gives an introduction to gravitational waves in astrophysics.

This series of lectures gives an introduction to complex analysis.

This online course gives an introduction to the programming language Java. It includes 8 lessons covering the fundamental syntax as well as objects, strings, data structures and...

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

This online lecture series examines classical and modern developments in graph theory and additive combinatorics, with a focus on topics and themes that connect the two...

This course teaches how to use the command line to manipulate data and automate tasks.

In this online course, Hans Zimmer teaches the art of composing and telling a story with music. The course includes more than 20 video lessons and various supplemental materials.