A deep dive into Article VI, which acts as the "glue" of the Constitution, holding together the new United States through a shared commitment to the Constitution's principles. In this video, Kim discusses Article VI with scholars Michael Ramsey and Kermit Roosevelt.

A deep dive into Article V of the US Constitution, which establishes the amendment process. In this video, Kim discusses Article V with scholars Michael Rappaport and David Strauss.

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.

In this art history video Beth Harris and Steven Zucker discuss Paul Troost's House of (German) Art (1933-37) in relation to the Great Exhibition of German Art and the Entartete Kunst (Degenerate Art) Exhibitions of 1937 in Munich.

The House of German Art now exhibits international contemporary art in direct opposition to original National Socialist intent.

Gavrilo Princip assassinated Austro-Hungarian Archduke Franz Ferdinand, setting off World War I. Created by Sal Khan.

Explore climate change on a geologic time scale, and consider recent human impacts on climate and the atmosphere. Created by Big History Project.

In this video, David explains how an atom can absorb and emit photons with particular values of energy and how to determine the allowed values.

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.

This art history video discussion examines these portraits by August Sander: "Pastry Cook", gelatin silver print, 1928, "Secretary at a Radio Station", Cologne, gelatin silver print, c. 1931, and "Disabled Man", gelatin silver print, 1926.

Octavian is victorious over Marc Antony and Cleopatra and becomes Augustus, first emperor of the Roman Empire.

This art history video discussion looks at the Roman statue of "Augustus of Primaporta", 1st century C.E. (Vatican Museums).

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.