This 16-minute video lesson looks at how the Sixth Coalition forces Napoleon into exile on Elba. [History playlist: Lesson 25 of 26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 16-minute video lesson looks at Napoleon and the War of the Fourth Coalition. It shows how Napoleon takes on Prussia and Russia and wins again. [History playlist: Lesson 22 of 26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 22-minute video lesson covers Napoleon and the war of The Third Coalition. It explains how Napoleon leads France to become the dominant power in Europe. Napoleon I becomes Emperor of France. [History playlist: Lesson 21 of 26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 13-minute video lesson covers Napoleon and the wars of The First Coalition and The Second Coalition against France. It focuses on Napolean's role. [History playlist: Lesson 20 of 26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 20-minute video lesson looks at Napoleon's Peninsular Campaigns and how French forces became embroiled in the Iberian Peninsula. [History playlist: Lesson 23 of 26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

In this 9-minute video lesson, Sal compares the pattern of U.S. Cold War interventions in Korea, Cuba, and Vietnam. [History playlist: Lesson 10 of 26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 8-minute video lesson considers Thomas Malthus's views on population growth and discusses Malthusian limits. [History playlist: Lesson 26 of 26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 18-minute video lesson gives a basic overview of U.S. history from Jamestown to the Civil War. [History playlist: Lesson 1 of 26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 14-minute video lesson gives a basic overview of U.S. history from reconstruction to the Great Depression. [History playlist: Lesson 3 of 26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 15-minute video lesson gives a basic overview of U.S. history from World War II to the Vietnam War. It briefly looks at Hitler, the Cold War, the Bay of Pigs, the Cuban Missile Crisis, and the Space Race. [History playlist: Lesson 4 of 26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 18-minute video lesson provides an overview of the Vietnam War. [History playlist: Lesson 9 of 26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

In this 14-minute video lesson Sal weighs in on capitalism and his understanding of when capitalism can potentially undermine innovation, competition and merit. [History playlist: Lesson 12 of 26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 7-minute video lesson looks at 2010 IIT JEE Paper 1 Problem 39.

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 7-minute video lesson continues to look at 2010 IIT JEE Paper 1 Problem 39.

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 3-minute video lesson concludes the discussion of 2010 IIT JEE Paper 1 Problem 39.

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This 11-minute video lesson introduces conic sections.

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Significant figures are the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value. We start counting significant figures at the first non-zero digit. Calculate the number of significant figures for an assortment of numbers.

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We've learned about matrix addition, matrix subtraction, matrix multiplication. So you might be wondering, is there the equivalent of matrix division? And before we get into that, let me introduce some concepts to you. And then we'll see that there is something that maybe isn't exactly division, but it's analogous to it.

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Sal checks whether the commutative property applies for matrix multiplication. In other words, he checks whether for any two matrices A and B, A*B=B*A (the answer is NO, by the way). Created by Sal Khan.

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Chemists are often interested in how fast a reaction will occur, and what we can do to control the rate. The study of reaction rates is called kinetics, and we will learn about average reaction rate, rate laws, the Arrhenius equation, reaction mechanisms, catalysts, and spectrophotometry.

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.