Crash Course
The Great Depression: Crash Course Black American History
During economic crises, marginalized communities are more susceptible to the harms and struggle that come with these downturns. Today we'll talk about the Great Depression, which lasted from 1929 until the US entered World War II. This...
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Degrees of Freedom and Effect Sizes - Crash Course Statistics
Today we're going to talk about degrees of freedom - which are the number of independent pieces of information that make up our models. More degrees of freedom typically mean more concrete results. But something that is statistically...
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Biomedical & Industrial Engineering: Crash Course Engineering #6
We’ve discussed the four main branches of engineering but there are so many other fields doing important work, so today we’re going to explore a few of them. In this episode we’ll explore some of the history and fundamentals of...
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How do we Classify Climates? Crash Course Geography
From gnocchi and salchipapas to potato chips and french fries, it seems like every cuisine around the world has embraced the potato! And this humble tuber did not originate in Ireland or France, but near Lake Titicaca near the border of...
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Nucleophiles and Electrophiles - Crash Course Organic Chemistry
Organic reactions are kind of like carefully choreographed fight scenes, and nucleophilic attack is a key move. This episode of Crash Course Organic Chemistry is all about nucleophiles and electrophiles, or what happens at those...
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What Does the Atmosphere Do Crash Course Geography
Much like a cell membrane, our atmosphere forms a protective boundary between outer space and the biosphere that allows for all life to exist on Earth’s surface. Today, we’re going to talk about its composition and layers (the...
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Check Yourself with Lateral Reading: Crash Course Navigating Digital Information #3
Look to your left. Look to your right. Look at this video. Today, John Green is going to teach you how to read laterally, using multiple tabs in your browser to look stuff up and fact check as you read. Real-time fact-checking an help...
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Aristotle & Virtue Theory: Crash Course Philosophy
This week we explore final ethical theory in this unit: Aristotle’s virtue theory. Hank explains the Golden Mean, and how it exists as the midpoint between vices of excess and deficiency. We’ll also discuss moral exemplars, and introduce...
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The Market Revolution Crash Course US History
In which John Green teaches you about the Market Revolution. In the first half of the 19th century, the way people lived and worked in the United States changed drastically. At play was the classic (if anything in a 30 year old nation...
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Alkyne Reactions Tautomerization - Crash Course Organic Chemistry
Carbon-carbon double bonds are pretty common in nature, but triple bonds between carbons, called alkynes, are not. When alkynes do pop up in nature, it’s usually in a compound that’s toxic to humans, however, we can synthesize alkynes...
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Atari and the Business of Video Games: Crash Course Games
Today, Andre is going to talk about the rise of Atari and with it the rise of the video game industry. So if you remember from last episode, we mentioned that the first arcade machine, Galaxy Game, happened to have a coin slot, but this...
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Radical Reactions Hammonds Postulate - Crash Course Organic Chemistry
Throughout this series we’ve mostly talked about pairs of electrons, but electrons don’t always have a buddy. An atom or group of atoms with a single unpaired electron is called a radical. In this episode of Crash Course Organic...
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Obamanation Crash Course US History
In which John Green teaches you about recent history. By which we mean VERY recent history. John covers the end of George W. Bush's administration presidency of Barack Obama (so far). Some people would say, "It's too soon to try to...
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The Digestive System: CrashCourse Biology
Hank takes us through the bowels of the human digestive system and explains why it's all about surface area.
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Is Growth Right For You? Crash Course Entrepreneurship
In business, growth basically means making a company more successful in some way: finding a new revenue stream, revamping the cost structure to minimize expenses and increase profit, or adding new people and knowledge to the team. Our...
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Aquinas & the Cosmological Arguments: Crash Course Philosophy
Our unit on the philosophy of religion and the existence of god continues with Thomas Aquinas. Today, we consider his first four arguments: the cosmological arguments.
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Eastern Europe Consolidates: Crash Course European History
While the focus has been on Western Europe so far, there has also been a lot going on in Eastern Europe, which we'll be looking at today. The Commonwealth of Poland-Lithuania, The Ottoman Empire, and Russia were all competing at the...
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Zola, France, Realism, and Naturalism: Crash Course Theater #31
This week, we're back in Europe to learn about Realism and Naturalism. In the 19th Century, playwrights like Eugene Scribe, Alexandre de Dumas Fils, and Emile Zola remade the French theater, first with Realism, and later with Naturalism....
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How Do Oceans Circulate? Crash Course Geography
Today, we're going to take a closer look at how the oceans circulate by following the life of a discarded water bottle as it gets snagged in the North Pacific Garbage Patch. We'll talk about what causes the movement of water, called...
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Using Wikipedia: Crash Course Navigating Digital Information #5
Let's talk about Wikipedia. Wikipedia is often maligned by teachers and twitter trolls alike as an unreliable source. And yes, it does sometimes have major errors and omissions, but Wikipedia is also the Internet's largest general...
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How Does Air Temperature Shape a Place Crash Course Geography
Today, we’re going to visit Siberia and take a closer look at how temperatures there (and around the globe) impact the way cultures, communities, and landscapes form. Air temperature plays a much bigger role than just helping us decide...
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Respiratory System, part 2: Crash Course A&P
Can a paper bag really help you when you are hyperventilating? It turns out that it can. In part 2 of our look at your respiratory system Hank explains how your blood cells exchange oxygen and CO2 to maintain homeostasis. We'll dive into...
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Globalization I - The Upside Crash Course World History
In which John Green teaches you about globalization, a subject so epic, so, um, global, it requires two videos. In this video, John follows the surprisingly complex path of t-shirt as it criss-crosses the world before coming to rest on...
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More Stereochemical Relationships - Crash Course Organic Chemistry
Enantiomers have almost all the same chemical and physical properties, so it can be tough to separate them. But it’s still super important that we know how to tell them apart! In this episode of Crash Course Organic Chemistry, we’ll...