An overview of how the Mongol Empire, founded by Genghis Khan in 1206, eventually becomes the largest contiguous empire in world history before splitting formally into the Yuan Dynasty, Golden Horde, Chagatai Khanate and Ilkhanate. ... https://www.youtube.com/watch?v=PiIJFRqrQYk Note: All Khan Academy content is available for free at (www.khanacademy.org)

Problems 6-9 starting on page 472 https://www.youtube.com/watch?v=MuhPEK5_kog

Dessalines takes on Leclerc and Rochambeau. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/humanities/world-history/renaissance-and-reformation/protestant-reformation/v/protestant-reformation-1?utm_source=YT&utm_medium=Desc&utm_campaign=worldhistory Missed the previous lesson? https://www.khanacademy.org/humanities/world-history/1600s-1800s/french-revolution-tutorial/v/french-revolution-part-3-reign-of-terror?utm_source=YT&utm_medium=Desc&utm_campaign=worldhistory World history on Khan Academy: Called the Great War (before World War II came about), World War I was the bloody wake-up call that humanity was entering into a new stage of civilization. Really the defining conflict that took Europe from 19th Century Imperial states that saw heroism in war into a modern shape. Unfortunately, it had to go through World War II as well (that some would argue was due to imbalances created by World War I). About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. ... https://www.youtube.com/watch?v=gU-5bjpAPmA Note: All Khan Academy content is available for free at (www.khanacademy.org)

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/precalculus/vectors-precalc/magnitude-direction/e/adding-vectors-in-magnitude-and-direction-form?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Watch the next lesson: https://www.khanacademy.org/math/precalculus/vectors-precalc/magnitude-direction/v/mag-vec-sums?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Missed the previous lesson? https://www.khanacademy.org/math/precalculus/vectors-precalc/magnitude-direction/v/mag-dir-vec-sums?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Precalculus on Khan Academy: You may think that precalculus is simply the course you take before calculus. You would be right, of course, but that definition doesn't mean anything unless you have some knowledge of what calculus is. Let's keep it simple, shall we? Calculus is a conceptual framework which provides systematic techniques for solving problems. These problems are appropriately applicable to analytic geometry and algebra. Therefore....precalculus gives you the background for the mathematical concepts, problems, issues and techniques that appear in calculus, including trigonometry, functions, complex numbers, vectors, matrices, and others. There you have it ladies and gentlemen....an introduction to precalculus! ... https://www.youtube.com/watch?v=SjY5UytlTTs Note: All Khan Academy content is available for free at (www.khanacademy.org)