Find out more about Susan Fong!
Learn about Tony DeRose.
Gilded Age versus Silicon Valley. A discussion with Sal Khan.
Learn how the Gini coefficient can be used to interpret income inequality in this video.
How to give constructive feedback.
More on the series A financing. Going back for another round with a series B financing. Created by Sal Khan.
The Abbasid Caliphate becomes a center of learning from the 9th to the 13th centuries, collecting the knowledge of India, China and ancient Greece while also making significant new contributions to mathematics, astronomy, philosophy, medicine and geography.
How a change in fiscal policy shifts the IS curve. Created by Sal Khan.
See how changes in costs affect cost curves in this video.
First let's review position, velocity and acceleration vs. time curves.
This video shows how to graph marginal cost, average variable cost, and average total cost. The relationship between these curves at important points is also explored.
Learn how to calculate gravitational potential energy when we can no longer assume the gravitational field is uniform.
Why do astronauts appear weightless despite being near the Earth? Created by Sal Khan.
After the fall of the Western Roman Empire in the 5th Century, division between the Latin Church in the West and the Greek-speaking church in the East widen over issues such as primacy of the Bishop of Rome, iconoclasm, filioque and the crowning of Charlemagne as Holy Roman Emperor.
After hundreds of years of increasing division between the Latin Church led by the Pope in Rome and the Eastern. Greek church led by the Byzantine Emperor and the Patriarch of Constantinople, the Great Schism in 1054 marks the beginning of the formal division between what will be known as the Roman Catholic Church and the Eastern Orthodox Church.
World War I began after Serbian nationalist Gavrilo Princip assassinated Archduke Franz Ferdinand of the Austro-Hungarian Empire on June 28, 1914. Austria-Hungary declared war on Serbia, whose ally Russia then mobilized for war. An alliance between Germany and Austria then prompted Germany to preemptively declare war on Russia, Serbia, and Russia's ally France. Germany then attacked France through Belgium, activating an alliance between the United Kingdom and Belgium, and the United Kingdom declared war on Germany and Austria-Hungary. Created by Sal Khan.
This 6-minute video lesson looks at greatest common divisors.
What were the Greco Persian wars and how did they start? Sal explains.
A primer of why Greece is in a tough situation (more in future videos). Created by Sal Khan.
What Greece could have done if it had its own currency. Created by Sal Khan.