Search Results: "Can"

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13:49
When Capitalism is Great and Not-so-great

527 views / 0 likes - added 9 years ago

Understanding when capitalism can potentially undermine innovation, competition and merit More free lessons at: http://www.khanacademy.org/video?v=8NJEeEUUhaI
02:09
Frequency Stability

541 views / 0 likes - added 9 years ago

Can humans generate truly random sequences More free lessons at: http://www.khanacademy.org/video?v=vVXbgbMp0oY
07:55
Economic Growth through Investment

496 views / 0 likes - added 9 years ago

How investing for capital formation can expand the production possibilities frontier (PPF) More free lessons at: http://www.khanacademy.org/video?v=a9aUMpGs6c8
08:56
Comparative Advantage Specialization and Gains from Trade

607 views / 0 likes - added 9 years ago

How two parties can get better outcomes by specializing in their comparative advantage and trading More free lessons at: http://www.khanacademy.org/video?v=xx9xNJlPOJo
05:48
Price of Related Products and Demand

606 views / 0 likes - added 9 years ago

How changes in the price of related goods can shift demand More free lessons at: http://www.khanacademy.org/video?v=-oClpRv7msg
03:33
Changes in Income, Population, or Preferences

650 views / 0 likes - added 9 years ago

How demand can be effected by changes in income, population or preferences More free lessons at: http://www.khanacademy.org/video?v=do1HDIdfQkU
12:11
Budget Line

465 views / 0 likes - added 9 years ago

What I can buy with my income More free lessons at: http://www.khanacademy.org/video?v=Uq5Wzs96tiw
06:38
Tragedy of the Commons

469 views / 0 likes - added 9 years ago

How public resources can be abused More free lessons at: http://www.khanacademy.org/video?v=0b2Tl0x-niw
07:34
Money Supply and Demand Impacting Interest Rates

479 views / 0 likes - added 9 years ago

Examples showing how various factors can affect interest rates More free lessons at: http://www.khanacademy.org/video?v=vItRHYu-A88
05:45
Cost Push Inflation

583 views / 0 likes - added 9 years ago

How an oil shock can slow the economy while causing inflation More free lessons at: http://www.khanacademy.org/video?v=3A-nAw2tY_4
02:40
Tax Lever of Fiscal Policy

456 views / 0 likes - added 9 years ago

How government can effect aggregate demand through tax policy More free lessons at: http://www.khanacademy.org/video?v=BRXBCxKjiK8
08:28
Overview of Fractional Reserve Banking

472 views / 0 likes - added 9 years ago

Big picture of how money enters circulation and how lending can increase the money supply More free lessons at: http://www.khanacademy.org/video?v=3mUi9IZb4T4
07:05
Simple Fractional Reserve Accounting (part 2)

520 views / 0 likes - added 9 years ago

How banks can actually create checking accounts under a fractional reserve system More free lessons at: http://www.khanacademy.org/video?v=PASajlCGBTw
11:45
Details on Shifting Aggregate Planned Expenditures

447 views / 0 likes - added 9 years ago

Showing how a change in government spending can lead to a new equilibrium More free lessons at: http://www.khanacademy.org/video?v=xF_Z4QK0tsA
06:07
Loanable Funds Interpretation of IS Curve

511 views / 0 likes - added 9 years ago

Thinking about how real GDP can drive real interest rates More free lessons at: http://www.khanacademy.org/video?v=blbR5f2dq_g
07:41
Math Mechanics of Thai Banking Crisis

652 views / 0 likes - added 9 years ago

Going through the mechanics of how a Thai financial institution can lose their shirt when their currency devalues. More free lessons at: http://www.khanacademy.org/video?v=9p3HNMe-oAI
11:34
Systemic Thinking About Cancer

637 views / 0 likes - added 9 years ago

Dr. David Agus discusses thinking systemically about cancer and other things More free lessons at: http://www.khanacademy.org/video?v=7zk0ubr_lzo
03:33
American Call Options

634 views / 0 likes - added 9 years ago

American Call Options More free lessons at: http://www.khanacademy.org/video?v=nnl3x1wo25g
09:56
Challenging Perimeter Problem

554 views / 0 likes - added 9 years ago

Perimeter of rectangle covered by 9 non-overlapping squares. From 200) American Invitational Math Exam More free lessons at: http://www.khanacademy.org/video?v=1uWZNW5PF-s
05:20
While Loops in Python

519 views / 0 likes - added 9 years ago

Seeing that a while loop can do the same thing as a for loop
13:58 Popular
Fun with Strings

732 views / 0 likes - added 9 years ago

Experimenting and seeing what we can do with strings
02:12 Popular
Exercise - Write a Sorting Function

969 views / 0 likes - added 9 years ago

Challenge to write a Python function that can sort a list in-place
12:57
Milankovitch Cycles Precession and Obliquity

505 views / 0 likes - added 9 years ago

How changes in Earth's rotation can effect Earth's seasons and climate More free lessons at: http://www.khanacademy.org/video?v=ZD8THEz18gc
10:35
Potassium-Argon (K-Ar) Dating

628 views / 0 likes - added 9 years ago

How K-Ar dating can be used to date very old volcanic rock and the things that might be buried in between More free lessons at: http://www.khanacademy.org/video?v=NMZ5kJEviD0
12:04
Currency Exchange Introduction

572 views / 0 likes - added 9 years ago

Introduction to how exchange rates can fluctuate More free lessons at: http://www.khanacademy.org/video?v=itoNb1lb5hY
15:27 Popular
American-Chinese Debt Loop

755 views / 0 likes - added 9 years ago

How the Chinese buying of American debt leads to lower interest rates More free lessons at: http://www.khanacademy.org/video?v=m5xu4r0szaA
19:52
Variation in a Species

582 views / 0 likes - added 9 years ago

How variation can be introduced into a species. More free lessons at: http://www.khanacademy.org/video?v=DuArVnT1i-E
12:36 Popular
Cancer

820 views / 1 likes - added 9 years ago

An introduction to what cancer is and how it is the by-product of broken DNA replication More free lessons at: http://www.khanacademy.org/video?v=RZhL7LDPk8w
17:03 Popular
Photorespiration

3,597 views / 2 likes - added 9 years ago

More detail on the Calvin Cycle and Photorespiration More free lessons at: http://www.khanacademy.org/video?v=EQvTEFCANTM
13:53
Sodium Potassium Pump

432 views / 0 likes - added 9 years ago

How a sodium potassium pump can maintain a voltage gradient across a cell or neuron's membrane More free lessons at: http://www.khanacademy.org/video?v=C_H-ONQFjpQ
15:54
Neuronal Synapses (Chemical)

499 views / 0 likes - added 9 years ago

How one neuron can stimulate (or inhibit) another neuron at a chemical synapse More free lessons at: http://www.khanacademy.org/video?v=Tbq-KZaXiL4
15:50
Keq derivation intuition (can skip; bit mathy)

506 views / 0 likes - added 9 years ago

A more concrete attempt at showing how the probabilities of molecules reacting is related to their concentration. More free lessons at: http://www.khanacademy.org/video?v=psLX080RQR8
12:22
Exponential Decay Formula Proof (can skip, involves Calculus)

643 views / 0 likes - added 9 years ago

Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class. More free lessons at: http://www.khanacademy.org/video?v=H7nrVDV8ahc
12:43
Work from Expansion

528 views / 0 likes - added 9 years ago

How a system can do work by expanding More free lessons at: http://www.khanacademy.org/video?v=obeGVTOZyfE
28:26
Reconciling Thermodynamic and State Definitions of Entropy

471 views / 0 likes - added 9 years ago

Long video explaining why entropy is a measure of the number of states a system can take on (mathy, but mind-blowing). More free lessons at: http://www.khanacademy.org/video?v=WLKEVfLFau4
14:01
Carnot Efficiency 2: Reversing the Cycle

488 views / 0 likes - added 9 years ago

Seeing how we can scale and or reverse a Carnot Engine (to make a refrigerator) More free lessons at: http://www.khanacademy.org/video?v=pQWwP7YYH6o
15:07
Enthalpy

619 views / 0 likes - added 9 years ago

Understanding why enthalpy can be viewed as "heat content" in a constant pressure system. More free lessons at: http://www.khanacademy.org/video?v=fucyI7Ouj2c
06:50 Popular
Liar Truthteller Brain Teaser

760 views / 0 likes - added 9 years ago

How to get correct advice when you can only ask one question from either a liar or a truthteller (when you don't know who is what) More free lessons at: http://www.khanacademy.org/video?v=69rDtSpshAw
15:03
Margin of Error 1

643 views / 0 likes - added 9 years ago

Finding the 95% confidence interval for the proportion of a population voting for a candidate. More free lessons at: http://www.khanacademy.org/video?v=OwPSuHXmiPw
10:05
Margin of Error 2

553 views / 0 likes - added 9 years ago

Finding the 95% confidence interval for the proportion of a population voting for a candidate. More free lessons at: http://www.khanacademy.org/video?v=YclQE2XtaLw
06:47 Popular
Squared Error of Regression Line

707 views / 0 likes - added 9 years ago

Introduction to the idea that one can find a line that minimizes the squared distances to the points More free lessons at: http://www.khanacademy.org/video?v=6OvhLPS7rj4
10:51
Bailout 5: Paying off the debt

587 views / 0 likes - added 9 years ago

How the bank can liquidate assets to pay off debt that comes due. More free lessons at: http://www.khanacademy.org/video?v=I8BLj7cRM7c
11:02
Banking 6: Bank Notes and Checks

623 views / 0 likes - added 9 years ago

More on how bank notes and checks can be used. More free lessons at: http://www.khanacademy.org/video?v=IOzZVmgK3IM
08:29
Banking 7: Giving out loans without giving out gold

671 views / 0 likes - added 9 years ago

How banks can give out loans without ever giving out gold. More free lessons at: http://www.khanacademy.org/video?v=On3c86V5A_E
10:50
Banking 8: Reserve Ratios

646 views / 0 likes - added 9 years ago

How reserve requirements limit how much lending a bank can do. More free lessons at: http://www.khanacademy.org/video?v=VP3nKDUw1jA
08:52
Banking 9: More on Reserve Ratios (Bad sound)

647 views / 0 likes - added 9 years ago

Seeing how reserve ratios limit how much lending I can do. More free lessons at: http://www.khanacademy.org/video?v=DFPBdbx0vFc
10:59
Bailout 13: Does the bailout have a chance of working?

599 views / 0 likes - added 9 years ago

Can the bailout work? More free lessons at: http://www.khanacademy.org/video?v=R528WbVdC0I
14:20
Matrices to solve a vector combination problem

582 views / 0 likes - added 9 years ago

Using matrices to figure out if some combination of 2 vectors can create a 3rd vector More free lessons at: http://www.khanacademy.org/video?v=gsNgdVdAT1o
14:27 Popular
Singular Matrices

702 views / 0 likes - added 9 years ago

When and why you can't invert a matrix. More free lessons at: http://www.khanacademy.org/video?v=UqyN7-tRS00
13:40
Showing that the candidate basis does span C(A)

627 views / 0 likes - added 9 years ago

Showing that just the columns of A associated with the pivot columns of rref(A) do indeed span C(A). More free lessons at: http://www.khanacademy.org/video?v=CkQOCnLWPUA
17:32 Popular
Linear Transformations as Matrix Vector Products

784 views / 0 likes - added 9 years ago

Showing how ANY linear transformation can be represented as a matrix vector product More free lessons at: http://www.khanacademy.org/video?v=PErhLkQcpZ8
27:01 Popular
Lin Alg: Representing vectors in Rn using subspace members

1,093 views / 0 likes - added 9 years ago

Showing that any member of Rn can be represented as a unique sum of a vector in subspace V and a vector in the orthogonal complement of V. More free lessons at: http://www.khanacademy.org/video?v=M6lFqkqvUgo
09:39
Spring potential energy example (mistake in math)

480 views / 0 likes - added 9 years ago

A spring, a frozen loop-d-loop and more! (See if you can find the mistake I made and get the right answer!) More free lessons at: http://www.khanacademy.org/video?v=P3QV9ktuYlQ
09:46
Harmonic Motion Part 2 (calculus)

548 views / 0 likes - added 9 years ago

We test whether Acos(wt) can describe the motion of the mass on a spring by substituting into the differential equation F=-kx More free lessons at: http://www.khanacademy.org/video?v=xoUppFlif04
09:05
The Bicameral Congress: Crash Course Government and Politics #2

700 views / 0 likes - added 9 years ago

In which Craig Benzine teaches you about the United States Congress, and why it's bicameral, and what bicameral means. Craig tells you what the Senate and House of Representatives are for, some of the history of the institutions, and reveal to you just ho
08:58
Congressional Elections: Crash Course Government and Politics #6

668 views / 0 likes - added 9 years ago

This week Craig Benzine talks about the importance of elections. But he isn’t going to focus on presidential elections, but instead those of the strongest part of our government: congressional elections. Craig will talk about the frequency of elections in
08:28
Congressional Committees: Crash Course Government and Politics #7

695 views / 0 likes - added 9 years ago

This week Craig Benzine clears up the role of committees in Congress. We’ll talk about standing committees, joint committees, conference committees, and caucuses (and not the candidate-choosing kinds) as well as the staff agencies that help advise these c
08:12
Congressional Leadership: Crash Course Government and Politics #8

647 views / 0 likes - added 9 years ago

This week Craig Benzine explores the leadership structure of congress. We’ll break out the clone machine to examine the responsibilities of the speaker of the house, the majority and minority leaders as well as the majority and minority whips in both the
07:01 Popular
How a Bill Becomes a Law: Crash Course Government and Politics #9

791 views / 1 likes - added 9 years ago

Oh my, Craig has his work cut out for him this week. The process of how a bill becomes a law can be pretty complex, fraught with potential bill-death at every corner. As if just getting through committee isn’t difficult enough, bills have to navigate a se
06:36
Congressional Decisions: Crash Course Government and Politics #10

631 views / 0 likes - added 9 years ago

This week Craig breaks out the crystal ball to try and figure out why our congresspeople do the things that they do. We’ll talk about the three motivating factors of congressional decisions - constituency, interest groups, and political parties - and we’l
06:30 Popular
Presidential Power: Crash Course Government and Politics #11

737 views / 0 likes - added 9 years ago

This week Craig looks at the expressed powers of the President of the United States - that is the ones you can find in the Constitution. From appointing judges and granting pardons, to vetoing laws and acting as the nation’s chief diplomat on foreign poli
11:17
Naked Eye Observations: Crash Course Astronomy #2

666 views / 0 likes - added 9 years ago

Today on Crash Course Astronomy, Phil invites you to head outside and take a look at all the incredible things you can see with your naked eye. -- Table of Contents: Naked Eye Observations 0:28.4 Constellations 3:09.7 The Color of Stars 2:44.5 View of the
09:29
Cycles in the Sky: Crash Course Astronomy #3

627 views / 0 likes - added 9 years ago

This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe. -- Table of Contents: Naked Eye Observations 0:28.4 Constellations 3:09.7 The Color of Stars 2:44.5 View of
12:01
Telescopes: Crash Course Astronomy #6

668 views / 0 likes - added 9 years ago

Today Phil explains how telescopes work and offers up some astronomical shopping advice. -- How Telescopes Work 1:07 Refractors vs Reflectors 2:50 Technology and the Light Spectrum 7:45 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios Follow P
11:21 Popular
Introduction to Anatomy&Physiology: Crash Course A&P #1

849 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.
10:43 Popular
Tissues, Part 1: Crash Course A&P #2

888 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: Jordan Schoonover FROM: Mom, Dad&Madison Happy Birthday Jordan! We love you sweetheart!! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything w
10:16 Popular
Tissues, Part 2 - Epithelial Tissue: Crash Course A&P #3

1,541 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO : Phoebe and James McMullan FROM : Dad Continue being awesome Phoebe&James from John&Hank! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything
10:29 Popular
Tissues, Part 3 - Connective Tissues: Crash Course A&P #4

1,136 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: Ashley FROM: Fee Happy birthday nerd also I love you lots and lots *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if y
09:43 Popular
Tissues, Part 4 - Types of Connective Tissues: Crash Course A&P #5

1,604 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: the world. FROM: Laura Love Rathbun Learning is the best thing to do with your you! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're
09:40 Popular
The Integumentary System, Part 1 - Skin Deep: Crash Course A&P #6

858 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: Ciaran FROM: your sister Jillian Happy birthday! Hope you enjoy being immortalized via doobly-doo! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with ev
09:57 Popular
The Integumentary System, Part 2 - Skin Deeper: Crash Course A&P #7

752 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: Helle Søndergaard FROM: Martin Søndergaard Congratulations for finishing first semester on physiotherapy! I'm so proud! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as
10:36 Popular
The Nervous System, Part 1: Crash Course A&P #8

1,172 views / 1 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: Kerry FROM: Cale I love you with all my ha-art. Deadset. *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can aff
11:44 Popular
The Nervous System, Part 2 - Action! Potential!: Crash Course A&P #9

1,146 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: Carla FROM: Christopher Next stop is whenever. Just be like, "stop." *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if
10:57 Popular
The Nervous System, Part 3 - Synapses!: Crash Course A&P #10

1,417 views / 0 likes - added 9 years ago

•••SUBBABLE MESSAGE••• TO: NerdFighteria FROM: Dave at DTXC.CO Cycling t-shirts at DTXC.CO. Don't give up the Road! DFTBA! *** Subbable Co-Sponsors: Logan Sanders https://www.facebook.com/perrylogans Dr. Boyev http://youtube.com/taichiknees *** You can di
10:08 Popular
Central Nervous System: Crash Course A&P #11

1,191 views / 1 likes - added 9 years ago

Today Hank talks about your central nervous system. In this episode we'll explore how your brain develops and how important location is for each of your brain's many functions. Table of Contents Central Nervous System, Location and Brain Function 1:48 Bra
10:02 Popular
Peripheral Nervous System: Crash Course A&P #12

1,531 views / 2 likes - added 9 years ago

It is now time to meet the system that helps your crazy brain stay in touch with the outside world. We follow up last week's tour of the central nervous system with a look at your peripheral nervous system, its afferent and efferent divisions, how it proc
08:49 Popular
Autonomic Nervous System: Crash Course A&P #13

1,513 views / 1 likes - added 9 years ago

Hank takes you on a tour of your two-part autonomic nervous system. This episode explains how your sympathetic nervous system and parasympathetic nervous system work together as foils, balancing each other out. Their key anatomical differences - where ner
13:41 Popular
Migrations and Intensification: Crash Course Big History #7

1,030 views / 0 likes - added 9 years ago

In which Hank and John Green teach you about humanity conquering the Earth. Or at least moving from Africa into the rest of the Earth. As human beings spread out across the world and populations grew, humanity reached a critical mass of innovators, and co
13:43 Popular
Rethinking Civilization - Crash Course World History 201

745 views / 0 likes - added 9 years ago

In which John Green returns to teaching World History! This week, we'll be talking about the idea of civilization, some of the traditional hallmarks of so-called civilization, and why some people would choose to live outside the civilization model. It tur
14:04 Popular
Money&Debt: Crash Course World History 202

902 views / 0 likes - added 9 years ago

In which John Green teaches about filthy, filthy lucre. Money. And Debt. So, what is money? And what is it for? And why do we use money? And why does it all disappear so quickly after payday? John will look into 75% of these questions, and if he doesn't c
11:37 Popular
Disease! Crash Course World History 203

976 views / 2 likes - added 9 years ago

In which John Green teaches you about disease, and the effects that disease has had in human history. Disease has been with man since the beginning, and it has shaped the way humans operate in a lot of ways. John will teach you about the Black Death, the
10:37 Popular
War&Human Nature: Crash Course World History 204

910 views / 2 likes - added 9 years ago

In which John Green teaches you about war! Specifically, John talks about whether humanity is naturally warlike, hard-wired to kill, or if perhaps war is a cultural construct. John will talk about the Hobbes versus Rousseau debate, the effects that war ha
12:48 Popular
War and Civilization: Crash Course World History 205

722 views / 3 likes - added 9 years ago

In which John Green investigates war, and what exactly it may or may not be good for. Was war a result of human beings organizing into larger and more complex agricultural social orders, or did war maybe create agriculture and "civilization?" It's hard to
10:08 Popular
Climate Change, Chaos, and The Little Ice Age - Crash Course World History 206

1,145 views / 2 likes - added 9 years ago

In which John Green teaches you about the Little Ice Age. The Little Ice Age was a period of global cooling that occurred from the 13th to the 19th centuries. This cooling was likely caused by a number of factors, including unusual solar activity and volc
07:21 Popular
Humans and Energy: Crash Course World History 207

1,098 views / 1 likes - added 9 years ago

In which Stan Muller subs for John Green and teaches you about energy and humanity. Today we discuss the ideas put forth by Alfred Crosby in his book, Children of the Sun. Historically, almost all of the energy that humans use has been directly or indirec
10:30 Popular
Drought and Famine: Crash Course World History #208

1,213 views / 0 likes - added 9 years ago

In which John Green teaches you a little bit about drought, which is a natural weather phenomenon, and famine, which is almost always the result of human activity. Throughout human history, when food shortages strike humanity, there was food around. There
09:10 Popular
HOW World War I Started: Crash Course World History 209

1,498 views / 6 likes - added 9 years ago

In which John Green teaches you about World War I and how it got started. Crash Course doesn't usually talk much about dates, but the way that things unfolded in July and August of 1914 are kind of important to understanding the Great War. You'll learn ab
10:56 Popular
Who Started World War I: Crash Course World History 210

1,072 views / 3 likes - added 9 years ago

In which John Green teaches you WHY World War I started. Or tries to anyway. With this kind of thing, it's kind of hard to assign blame to any one of the nations involved. Did the fault lie with Austria-Hungary? Germany? Russia? Julius Caesar? One thing w
12:59 Popular
The End of Civilization (In the Bronze Age): Crash Course World History 211

861 views / 1 likes - added 9 years ago

In which John Green teaches you about the Bronze Age civilization in what we today call the middle east, and how the vast, interconnected civilization that encompassed Egypt, The Levant, and Mesopotamia came to an end. What's that you say? There was no su
11:54 Popular
The Rise of the West and Historical Methodology: Crash Course World History #212

896 views / 2 likes - added 9 years ago

In which John Green talks about the methods of writing history by looking at some of the ways that history has been written about the rise of the West. But first he has to tell you what the West is. And then he has to explain the Rise of the West. And the
12:55 Popular
Asian Responses to Imperialism: Crash Course World History #213

803 views / 0 likes - added 9 years ago

In which John Green teaches you about Imperialism, but not from the perspective of the colonizers. This week John looks at some Asian perspectives on Imperialism, specifically writers from countries that were colonized by European powers. We'll look at th
12:31 Popular
The Railroad Journey and the Industrial Revolution: Crash Course World History 214

742 views / 2 likes - added 9 years ago

In which John Green teaches you about railroads, and some of the ways they changed the world, and how they were a sort of microcosm for the Industrial Revolution as a whole. Prior to the invention of steam powered railroads, pretty much all locomotion had
12:51 Popular
Population, Sustainability, and Malthus: Crash Course World History 215

1,138 views / 0 likes - added 9 years ago

In which John Green teaches you about population. So, how many people can reasonably live on the Earth? Thomas Malthus got it totally wrong in the 19th century, but for some reason, he keeps coming up when we talk about population. In 1800, the human popu
13:28 Popular
Islam and Politics: Crash Course World History 216

1,110 views / 0 likes - added 9 years ago

In which John Green teaches you about how Islam has interacted with politics during it's history, and how it continues to do so today. Islamist movements are in the news a lot lately, but how did that happen. John will point out that Islam has alway been
11:44 Popular
The Mughal Empire and Historical Reputation: Crash Course World History #217

994 views / 0 likes - added 9 years ago

There's a new Crash Course poster with all your favorite World History characters! Czech it: http://store.dftba.com/products/crashcourse-characters-poster In which John Green teaches you about the Mughal Empire, which ruled large swaths of the Indian Sub-
15:07 Popular
Luther and the Protestant Reformation: Crash Course World History #218

990 views / 3 likes - added 9 years ago

In which John Green teaches you about the Protestant Reformation. Prior to the Protestant Reformation, pretty much everyone in Europe was a Roman Catholic. Not to get all great man, but Martin Luther changed all that. Martin Luther didn't like the corrupt
13:16 Popular
Charles V and the Holy Roman Empire: Crash Course World History #219

1,090 views / 2 likes - added 9 years ago

Get the new Crash Course World History Character poster here: http://store.dftba.com/products/crashcourse-characters-poster In which John Green teaches you about the Holy Roman Empire by teaching you about Charles V. Charles Hapsburg was the holy Roman Em
11:02 Popular
World War II, A War for Resources: Crash Course World History #220

1,673 views / 11 likes - added 9 years ago

In which John Green teaches you about World War II, and some of the causes behind the war. In a lot of ways, WWII was about resources, and especially about food. The expansionist aggression of both Germany and Japan were in a lot of ways about resources.
12:58 Popular
Congo and Africa's World War: Crash Course World History 221

871 views / 2 likes - added 9 years ago

In which John Green teaches you about the Democratic Republic of the Congo, which used to be Zaire, which used to be The Belgian Congo, which used to be the Congo Free State, which used to be the region surrounding the Congo River Basin in central Africa.
11:09
Water and Classical Civilizations: Crash Course World History 222

680 views / 0 likes - added 9 years ago

In which John Green teaches you about water! So, we talk about resources a lot on Crash Course, and today is no exception. It turns out people can't live without water, which means it's absolutely necessary for civilization. Today John talks about water i
12:53 Popular
Conflict in Israel and Palestine: Crash Course World History 223

859 views / 1 likes - added 9 years ago

In which John Green teaches you about conflict in Israel and Palestine. This conflict is often cast as a long-term beef going back thousands of years, and rooted in a clash between religions. Well, that's not quite true. What is true is that the conflict
11:18 Popular
The Vikings! - Crash Course World History 224

1,302 views / 5 likes - added 9 years ago

In which John Green teaches you about Vikings! That's right, one of our most requested subjects, the Vikings, right here on Crash Course. So what's the deal with Vikings? Well, the stuff you've heard about them may not be true. The Vikings weren't just pa
13:33 Popular
Japan in the Heian Period and Cultural History: Crash Course World History 227

1,307 views / 7 likes - added 9 years ago

In which John Green teaches you about what westerners call the middle ages and the lives of the aristocracy...in Japan. The Heian period in Japan lasted from 794CE to 1185CE, and it was an interesting time in Japan. Rather than being known for a thriving
10:54 Popular
Intro to Psychology - Crash Course Psychology #1

999 views / 0 likes - added 9 years ago

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10:51 Popular
Psychological Research - Crash Course Psychology #2

807 views / 1 likes - added 9 years ago

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10:14 Popular
The Chemical Mind - Crash Course Psychology #3

936 views / 0 likes - added 9 years ago

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12:34 Popular
Meet Your Master: Getting to Know Your Brain - Crash Course Psychology #4

912 views / 0 likes - added 9 years ago

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10:46 Popular
Sensation&Perception - Crash Course Psychology #5

742 views / 0 likes - added 9 years ago

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10:24 Popular
Homunculus - Crash Course Psychology #6

715 views / 0 likes - added 9 years ago

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10:00
Perceiving is Believing - Crash Course Psychology #7

676 views / 0 likes - added 9 years ago

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09:34 Popular
Consciousness - Crash Course Psychology #8

1,099 views / 0 likes - added 9 years ago

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10:41 Popular
To Sleep, Perchance to Dream - Crash Course Psychology #9

1,312 views / 0 likes - added 9 years ago

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11:19
Altered States - Crash Course Psychology #10

682 views / 0 likes - added 9 years ago

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11:50 Popular
How to Train a Brain - Crash Course Psychology #11

1,115 views / 0 likes - added 9 years ago

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09:35 Popular
The Bobo Beatdown - Crash Course Psychology #12

843 views / 0 likes - added 9 years ago

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09:55 Popular
How We Make Memories - Crash Course Psychology #13

1,135 views / 0 likes - added 9 years ago

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10:18 Popular
Remembering and Forgetting - Crash Course Psychology #14

941 views / 1 likes - added 9 years ago

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10:42 Popular
Cognition: How Your Mind Can Amaze and Betray You - Crash Course Psychology #15

906 views / 1 likes - added 9 years ago

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10:02 Popular
Language: Crash Course Psychology #16

879 views / 0 likes - added 9 years ago

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11:20 Popular
The Power of Motivation: Crash Course Psychology #17

1,016 views / 0 likes - added 9 years ago

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09:50 Popular
The Growth of Knowledge: Crash Course Psychology #18

1,035 views / 0 likes - added 9 years ago

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11:38 Popular
Monkeys and Morality: Crash Course Psychology #19

844 views / 0 likes - added 9 years ago

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10:15 Popular
Adolescence: Crash Course Psychology #20

1,022 views / 0 likes - added 9 years ago

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12:24 Popular
Rorschach&Freudians: Crash Course Psychology #21

708 views / 0 likes - added 9 years ago

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11:08 Popular
Measuring Personality: Crash Course Psychology #22

1,032 views / 1 likes - added 9 years ago

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12:39 Popular
Controversy of Intelligence: Crash Course Psychology #23

994 views / 0 likes - added 9 years ago

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11:04 Popular
Brains Vs. Bias: Crash Course Psychology #24

709 views / 1 likes - added 9 years ago

***Subbable Message*** To: Everyone! Life is short. Don't forget to be awesome. Please. From: Dr. Dot To: All Living People Prepare - for I am about to take over the world. From: S.J. Black ****** You can directly support Crash Course at http://www.subbab
10:51 Popular
Feeling All the Feels: Crash Course Psychology #25

738 views / 2 likes - added 9 years ago

***Subbable Message*** To Robert, Thank you for showing me the world, darling! From Amy and That's happiness; to be dissolved into something complete and great. From Ty Scaletta ****** You can directly support Crash Course at http://www.subbable.com/crash
10:20 Popular
Emotion, Stress and Health: Crash Course Psychology #26

968 views / 1 likes - added 9 years ago

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10:10 Popular
Psychological Disorders: Crash Course Psychology #28

871 views / 0 likes - added 9 years ago

***SUBBABLE MESSAGES*** To: Lola From: Daddy You are the best, I love you. *** To: Future Lia From: Mom and Dad Remember that learning isn't just useful, but also really fun! *** You can directly support Crash Course at http://www.subbable.com/crashcourse
11:32 Popular
OCD&Anxiety Disorders: Crash Course Psychology #29

891 views / 0 likes - added 9 years ago

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10:00
Depressive and Bipolar Disorders: Crash Course Psychology #30

685 views / 2 likes - added 9 years ago

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10:51
Trauma&Addiction: Crash Course Psychology #31

655 views / 0 likes - added 9 years ago

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11:44
Schizophrenia&Dissociative Disorders: Crash Course Psychology #32

610 views / 0 likes - added 9 years ago

••• Subbable Message ••• To: Margarete From: Toni Your sister thinks you are the best! Here's hoping Crash Course does an Art History season just for you. :) ••• To get your own message in the dooblydoo, you can directly support Crash Course at http://www
10:12 Popular
Eating and Body Dysmorphic Disorders: Crash Course Psychology #33

741 views / 0 likes - added 9 years ago

Get Help: If you think you have an eating disorder, please contact http://www.nationaleatingdisorders.org/ for help! You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we'r
10:58 Popular
Personality Disorders: Crash Course Psychology #34

875 views / 1 likes - added 9 years ago

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11:23 Popular
Getting Help - Psychotherapy: Crash Course Psychology #35

705 views / 0 likes - added 9 years ago

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11:09
Biomedical Treatments: Crash Course Psychology #36

686 views / 0 likes - added 9 years ago

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10:48 Popular
Social Thinking: Crash Course Psychology #37

707 views / 0 likes - added 9 years ago

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10:08 Popular
Social Influence: Crash Course Psychology #38

766 views / 0 likes - added 9 years ago

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09:54 Popular
Prejudice&Discrimination: Crash Course Psychology #39

765 views / 0 likes - added 9 years ago

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10:41
Aggression V. Altruism: Crash Course Psychology #40

680 views / 0 likes - added 9 years ago

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10:12 Popular
The Nucleus: Crash Course Chemistry #1

915 views / 1 likes - added 9 years ago

Hank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three tiny particles - the proton, neutron and electron - come together in trillions of combinations to f
11:24 Popular
Unit Conversion&Significant Figures: Crash Course Chemistry #2

753 views / 0 likes - added 9 years ago

A unit is the frequently arbitrary designation we have given to something to convey a definite magnitude of a physical quantity and every quantity can be expressed in terms of the seven base units that are contained in the international system of units. H
11:22 Popular
The Periodic Table: Crash Course Chemistry #4

1,142 views / 1 likes - added 9 years ago

Hank gives us a tour of the most important table ever, including the life story of the obsessive man who championed it, Dmitri Mendeleev. The periodic table of elements is a concise, information-dense catalog of all of the different sorts of atoms in the
12:48 Popular
The Electron: Crash Course Chemistry #5

968 views / 0 likes - added 9 years ago

Hank brings us the story of the electron and describes how reality is a kind of music, discussing electron shells and orbitals, electron configurations, ionization and electron affinities, and how all these things can be understood via the periodic table.
12:47
Stoichiometry: Chemistry for Massive Creatures - Crash Course Chemistry #6

681 views / 0 likes - added 9 years ago

Chemists need stoichiometry to make the scale of chemistry more understandable - Hank is here to explain why, and to teach us how to use it. Table of Contents Atomic Mass Units 2:24 Moles 5:12 Molar Mass 5:59 Equation Balancing 8:45 Molar Ratios 11:11 Cra
13:34 Popular
Water and Solutions -- for Dirty Laundry: Crash Course Chemistry #7

1,584 views / 0 likes - added 9 years ago

Dihydrogen monoxide (better know as water) is the key to nearly everything. It falls from the sky, makes up 60% of our bodies, and just about every chemical process related to life takes place with it or in it. Without it, none of the chemical reactions t
11:17 Popular
Acid-Base Reactions in Solution: Crash Course Chemistry #8

1,415 views / 0 likes - added 9 years ago

Last week, Hank talked about how stuff mixes together in solutions. Today, and for the next few weeks, he will talk about the actual reactions happening in those solutions - atoms reorganizing themselves to create whole new substances in the processes tha
10:43
How To Speak Chemistrian: Crash Course Chemistry #11

646 views / 0 likes - added 9 years ago

Learning to talk about chemistry can be like learning a foreign language, but Hank is here to help with some straightforward and simple rules to help you learn to speak Chemistrian like a native. Table of Contents Determining Formulas and Names of Monatom
11:45 Popular
Ideal Gas Problems: Crash Course Chemistry #13

922 views / 0 likes - added 9 years ago

We don't live in a perfect world, and neither do gases - it would be great if their particles always fulfilled the assumptions of the ideal gas law, and we could use PV=nRT to get the right answer every time. Unfortunately, the ideal gas law (like our cul
11:24 Popular
Enthalpy: Crash Course Chemistry #18

1,128 views / 0 likes - added 9 years ago

Energy is like the bestest best friend ever and yet, most of the time we take it for granted. Hank feels bad for our friend and wants us to learn more about it so that we can understand what it's trying to tell us - like that any bond between two atoms co
09:46 Popular
Atomic Hook-Ups - Types of Chemical Bonds: Crash Course Chemistry #22

948 views / 0 likes - added 9 years ago

Atoms are a lot like us - we call their relationships "bonds," and there are many different types. Each kind of atomic relationship requires a different type of energy, but they all do best when they settle into the lowest stress situation possible. The n
11:38 Popular
Bonding Models and Lewis Structures: Crash Course Chemistry #24

703 views / 0 likes - added 9 years ago

Models are great, except they're also usually inaccurate. In this episode of Crash Course Chemistry, Hank discusses why we need models in the world and how we can learn from them... even when they're almost completely wrong. Plus, Lewis Structures! -- Tab
08:21
Solutions: Crash Course Chemistry #27

698 views / 0 likes - added 9 years ago

This week, Hank elaborates on why Fugu can kill you by illustrating the ideas of solutions and discussing molarity, molality, and mass percent. Also, why polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes. All that plus
09:29 Popular
Equilibrium Equations: Crash Course Chemistry #29

736 views / 0 likes - added 9 years ago

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11:23 Popular
pH and pOH: Crash Course Chemistry #30

910 views / 1 likes - added 9 years ago

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11:41 Popular
Buffers, the Acid Rain Slayer: Crash Course Chemistry #31

1,017 views / 2 likes - added 9 years ago

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09:57
Kinetics: Chemistry's Demolition Derby - Crash Course Chemistry #32

631 views / 0 likes - added 9 years ago

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09:18 Popular
Doing Solids: Crash Course Chemistry #33

1,099 views / 0 likes - added 9 years ago

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08:20 Popular
Network Solids and Carbon: Crash Course Chemistry #34

930 views / 0 likes - added 9 years ago

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09:27 Popular
Silicon - The Internet's Favorite Element: Crash Course Chemistry #35

1,292 views / 0 likes - added 9 years ago

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09:04 Popular
Electrochemistry: Crash Course Chemistry #36

1,487 views / 0 likes - added 9 years ago

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09:42 Popular
The History of Atomic Chemistry: Crash Course Chemistry #37

1,046 views / 0 likes - added 9 years ago

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09:58 Popular
Nuclear Chemistry: Crash Course Chemistry #38

751 views / 0 likes - added 9 years ago

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11:18 Popular
Nuclear Chemistry Part 2: Fusion and Fission - Crash Course Chemistry #39

1,726 views / 1 likes - added 9 years ago

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11:32 Popular
Hydrocarbon Power! - Crash Course Chemistry #40

905 views / 0 likes - added 9 years ago

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09:36 Popular
Alkenes&Alkynes - Crash Course Chemistry #41

1,086 views / 0 likes - added 9 years ago

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09:50 Popular
Aromatics and Cyclic Compounds - Crash Course Chemistry #42

1,780 views / 0 likes - added 9 years ago

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08:38 Popular
Hydrocarbon Derivatives - Crash Course Chemistry #43

1,114 views / 0 likes - added 9 years ago

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09:05 Popular
Nomenclature - Crash Course Chemistry #44

1,360 views / 0 likes - added 9 years ago

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10:15 Popular
Polymers - Crash Course Chemistry #45

1,963 views / 0 likes - added 9 years ago

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10:34 Popular
The Global Carbon Cycle - Crash Course Chemistry #46

1,699 views / 0 likes - added 9 years ago

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11:20 Popular
The Black Legend, Native Americans, and Spaniards: Crash Course US History #1

915 views / 1 likes - added 9 years ago

In which John Green kicks off Crash Course US History! Why, you may ask, are we covering US History, and not more World History, or the history of some other country, or the very specific history of your home region? Well, the reasons are many. But, like
12:26 Popular
When is Thanksgiving? Colonizing America: Crash Course US History #2

881 views / 1 likes - added 9 years ago

In which John Green teaches you about the (English) colonies in what is now the United States. He covers the first permanent English colony at Jamestown, Virginia, the various theocracies in Massachusetts, the feudal kingdom in Maryland, and even a bit ab
11:38
The Quakers, the Dutch, and the Ladies: Crash Course US History #4

655 views / 2 likes - added 9 years ago

In which John Green teaches you about some of the colonies that were not in Virginia or Massachussetts. Old New York was once New Amsterdam. Why they changed it, I can say; ENGLISH people just liked it better that way, and when the English took New Amster
10:40 Popular
The Seven Years War and the Great Awakening: Crash Course US History #5

35.8k views / 308 likes - added 9 years ago

In which John Green teaches you about the beginnings of the American Revolution in a video titled The Seven Years War. Confusing? Maybe. John argues that the Seven Years War, which is often called the French and Indian War in the US, laid a lot of the gro
12:19 Popular
Taxes&Smuggling - Prelude to Revolution: Crash Course US History #6

820 views / 1 likes - added 9 years ago

In which John Green teaches you about the roots of the American Revolution. The Revolution did not start on July 4, 1776. The Revolutionary War didn't start on July 4 either. (as you remember, I'm sure, the Revolution and the Revolutionary War are not the
12:41 Popular
Who Won the American Revolution?: Crash Course US History #7

1,037 views / 1 likes - added 9 years ago

In which John Green teaches you about the American Revolution. And the Revolutionary War. I know we've labored the point here, but they weren't the same thing. In any case, John will teach you about the major battles of the war, and discuss the strategies
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13:04 Popular
The Constitution, the Articles, and Federalism: Crash Course US History #8

1,070 views / 3 likes - added 9 years ago

In which John Green teaches you about the United States Constitution. During and after the American Revolutionary War, the government of the new country operated under the Articles of Confederation. While these Articles got the young nation through its wa
13:57 Popular
Where US Politics Came From: Crash Course US History #9

756 views / 0 likes - added 9 years ago

In which John Green teaches you where American politicians come from. In the beginning, soon after the US constitution was adopted, politics were pretty non-existent. George Washington was elected president with no opposition, everything was new and excit
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13:19 Popular
Thomas Jefferson&His Democracy: Crash Course US History #10

882 views / 3 likes - added 9 years ago

In which John Green teaches you about founding father and third president of the United States, Thomas Jefferson. Jefferson is a somewhat controversial figure in American history, largely because he, like pretty much all humans, was a big bundle of contra
12:43 Popular
The War of 1812 - Crash Course US History #11

925 views / 1 likes - added 9 years ago

In which John Green teaches you about the War of 1812. The War of 1812 was fought between the United States and its former colonial overlord England. It started in, you guessed it 1812. The war lasted until 1815, and it resolved very little. John will tak
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14:11 Popular
The Market Revolution: Crash Course US History #12

781 views / 0 likes - added 9 years ago

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 can be called classi
15:05 Popular
Age of Jackson: Crash Course US History #14

944 views / 2 likes - added 9 years ago

In which John Green teaches you about the presidency of Andrew Jackson So how did a president with astoundingly bad fiscal policies end up on the $20 bill? That's a question we can't answer, but we can tell you how Jackson got to be president, and how he
14:47 Popular
19th Century Reforms: Crash Course US History #15

940 views / 1 likes - added 9 years ago

In which John Green teaches you about various reform movements in the 19th century United States. From Utopian societies to the Second Great Awakening to the Abolition movement, American society was undergoing great changes in the first half of the 19th c
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Women in the 19th Century: Crash Course US History #16

1,152 views / 1 likes - added 9 years ago

In which John Green finally gets around to talking about some women's history. In the 19th Century, the United States was changing rapidly, as we noted in the recent Market Revolution and Reform Movements episodes. Things were also in a state of flux for
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War&Expansion: Crash Course US History #17

634 views / 0 likes - added 9 years ago

In which John Green teaches you about the Mexican-American War in the late 1840s, and the expansion of the United States into the western end of North America. In this episode of Crash Course, US territory finally reaches from the Atlantic coast to the Pa
05:28 Popular
History of the 4th of July: Crash Course US History Special

821 views / 3 likes - added 9 years ago

In which John Green teaches you a bit about the 4th of July. In this special short Crash Course, John celebrates American Independence Day by teaching you how the holiday came to be on the 4th of July, and the many ways that Americans celebrate the day. T
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Reconstruction and 1876: Crash Course US History #22

1,019 views / 1 likes - added 9 years ago

In which John Green teaches you about Reconstruction. After the divisive, destructive Civil War, Abraham Lincoln had a plan to reconcile the country and make it whole again. Then he got shot, Andrew Johnson took over, and the disagreements between Johnson
12:32 Popular
The Industrial Economy: Crash Course US History #23

923 views / 0 likes - added 9 years ago

In which John Green teaches you about the Industrial Economy that arose in the United States after the Civil War. You know how when you're studying history, and you're reading along and everything seems safely in the past, and then BOOM you think, "Man, t
12:44 Popular
Westward Expansion: Crash Course US History #24

1,694 views / 5 likes - added 9 years ago

In which John Green teaches you about the Wild, Wild, West, which as it turns out, wasn't as wild as it seemed in the movies. When we think of the western expansion of the United States in the 19th century, we're conditioned to imagine the loner. The self
13:51 Popular
Gilded Age Politics:Crash Course US History #26

791 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps keep the channel producing great conten
15:01 Popular
The Progressive Era: Crash Course US History #27

898 views / 1 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps keep the channel producing great conten
14:04 Popular
American Imperialism: Crash Course US History #28

1,376 views / 0 likes - added 9 years ago

In which John Green teaches you about Imperialism. In the late 19th century, the great powers of Europe were running around the world obtaining colonial possessions, especially in Africa and Asia. The United States, which as a young country was especially
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Progressive Presidents: Crash Course US History #29

728 views / 1 likes - added 9 years ago

In which John Green teaches you about the Progressive Presidents, who are not a super-group of former presidents who create complicated, symphonic, rock soundscapes that transport you into a fantasy fugue state. Although that would be awesome. The preside
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America in World War I: Crash Course US History #30

896 views / 2 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
13:31 Popular
Women's Suffrage: Crash Course US History #31

746 views / 2 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
13:12 Popular
The Roaring 20's: Crash Course US History #32

2,199 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
14:27 Popular
The Great Depression: Crash Course US History #33

1,868 views / 7 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
14:57 Popular
The New Deal: Crash Course US History #34

1,221 views / 0 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
13:27 Popular
World War II Part 1: Crash Course US History #35

1,484 views / 6 likes - added 9 years ago

You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Free is nice, but if you can afford to pay a little every month, it really helps us to continue producing th
14:23 Popular
World War II Part 2 - The Homefront: Crash Course US History #36

1,442 views / 3 likes - added 9 years ago

Crash Course World History is now available on DVD! Visit http://dft.ba/-CCWHDVD to buy a set for your home or classroom. You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything
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The Cold War: Crash Course US History #37

916 views / 3 likes - added 9 years ago

Crash Course World History is now available on DVD! Visit http://dft.ba/-CCWHDVD to buy a set for your home or classroom. You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything

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