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Vectors
Online classWatch Sal figure out which of a few options could be represented by a vector. Remember that vectors have both magnitude and direction!
Vectors and spaces
Online classWe will begin our journey through linear algebra by defining and conceptualizing what a vector is (rather than starting with matrices and matrix operations like in a more basic algebra course) and...
Victorian art and architecture
Art HistoryCollege | Online class
In 1848, a small group of young artists banded together and formed “The Pre-Raphaelite Brotherhood,” a name which sounds intentionally backward-looking and medieval. The Pre-Raphaelites looked back...
Volume and surface area
Online classVolume and surface area help us measure the size of 3D objects. We’ll start with the volume and surface area of rectangular prisms. From there, we’ll tackle trickier objects, such as cones and...
Water, acids, and bases
7th - College | Online classWater is key to life, and hydrogen bonding is key to understanding water! Learn how the structure of water and the properties of O and H atoms allow water molecules to “stick” to each other via...
Welcome to grammar!
Grammar4th - High School | Online class
Khan Academy Grammarian David Rheinstrom welcomes you to his favorite topic: the study of language, its rules, and its conventions. By understanding English – …
West Africa
High School - College | Online classThe Republic of Mali is part of West Africa and has a varied geography. In the south and west are verdant river valleys while the north and east jut into the Sahara Desert. It is a French speaking...
West and central Asia: 500 B.C.E.-1980 C.E.
9th - College | Online classThe arts of West and Central Asia play a key role in the history of world art, giving form to the vast cultural interchanges that have occurred in these lands that link the European and Asian peoples.
Work and energy
Work & EnergyHigh School - College | Online class
“Energy” is a word that’s used a lot. Here, you’ll learn about how it’s one of the most useful concepts in physics. Along the way, we’ll talk about work, kinetic energy, potential energy,...
World history
World History7th - College | Online class
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...
World War I, Futurism and Dada
High School - College | Online classBoccioni and the Futurists responded very differently than did Duchamp and the Dada artists to the violence of the Great War. Dada was an anti-art movement that sought to subvert the function of...