Pamela shows how to store arrays of objects - a very powerful tool for your programs.
Before the United States had the Constitution, it had the Articles of Confederation, a much weaker government that lasted from 1777 to 1789. In this video, Kim and Leah discuss the pros and cons of the Articles, and the reasons they were discarded in favor of a new Constitution.
An introduction to the Articles of Confederation and its weaknesses. Shays' Rebellion was one of the catalysts for the Constitutional Convention of 1787.
How humans have shaped plants and animals through artificial selection and domestication.
Binary fission, budding, mitosis, fragmentation, parthenogenesis and sexual reproduction.
Gavrilo Princip assassinated Austro-Hungarian Archduke Franz Ferdinand, setting off World War I. Created by Sal Khan.
Chemistry is the study of matter, and all matter is made up of atoms. We will learn about elements, atomic number and mass, isotopes, moles (chemistry moles, not the animal), and compounds.
Attaching the LED eyes. Created by Karl Wendt.
Octavian is victorious over Marc Antony and Cleopatra and becomes Augustus, first emperor of the Roman Empire.
In addition to discretionary fiscal policy, there are policies and institutions that can help reduce swings in the business cycle. This video discusses the role of automatic stabilizers in the business cycle.
Sal solves a word problem to find average velocity and speed of an object in one-dimension.
KA's historian Kim Kutz Elliott talks about strategies for improving your historical essays.
An overview of how Tenochtitlan creates the tributary Aztec Empire in the 15th Century (from the Triple Alliance). They rule until being conquered by Hernando Cortez. Created by World History Project.
"FANBOYS" is a mnemonic device you can use to help remember the coordinating conjunctions of English. Team Grammar made this video, figuring that we couldn't very well cover conjunctions without writing a song, now could we? If you're moved to make your own version, send it our way at remix@khanacademy.org; we're excited to hear what you do!
The apostrophe has a bizarre history, including being the name for something that's not really related to grammar at all. David, Paige, and special guest Jake explain.
David, Paige, and Jake cover the fascinating history of the possessive apostrophe. Stay tuned for this bonus video!
David and Paige tackle the great comma debate of our time: Oxford comma or no Oxford comma?
Why does "goose" become "geese" and "foot" become "feet"? David the Grammarian and Jake the Linguist explain.
You may have been hearing a lot about the "singular they" recently. But what is it? How does it work, what is its history, and is it grammatical? Let's find out.
Back of the envelope calculation of which office space to rent. Created by Sal Khan.