Kinematic equations help solve for an unknown in a problem when an object has either a constant velocity or constant acceleration. This video will help you choose which kinematic equations you should use, given the type of problem you're working through.

Overview of the changing relationship between the Roman Empire and Christianity from the time of Jesus to the reign of Theodosius.

Who was Christopher Columbus? In this video, Kim explores Columbus's background, his search for royal patronage, and his first voyage in 1492.

This art history video discussion looks at Petrus Christus' "Portrait of a Carthusian", 1446 (Metropolitan Museum of Art).

This art history video discussion examines Petrus Christus' "Portrait of a Young Woman," c. 1470, oil on oak, 29 x 22.50 cm (Gemaldegalerie, Staatliche Museen zu Berlin).

Overview of DNA transcription, translation, and replication during mitosis and meiosis. Learn about chromosomes, chromatids, and chromatin.

Discussion of the relatively recent changes in our ability as a species to shine light on our deep past. Created by Sal Khan.

This art history video discussion examines Cimabue's "Maesta of Santa Trinita," 1280-1290, tempera on panel, 151 1/2 x 87 3/4" (385 x 223 cm), Uffizi, Florence.

Adafruit founder Limor Fried and virtual reality designer Nat Brown show how simple logical circuits underlie everything your computer does.

Definition of circuit terms: element, component, node, branch, mesh, and loop . Created by Willy McAllister.

In a closed economy, goods and services are exchanged in product markets and factors of production are exchanged in factor markets. In this video, we explore how to model this in a straightforward way using the circular flow model. Created by Sal Khan.

A deep dive into Citizens United v. FEC, a 2010 Supreme Court case that ruled that political spending by corporations, associations, and labor unions is a form of protected speech under the First Amendment. In this video, Sal discusses the case with scholars Richard Hasen and Bradley Smith.

How has the citizenship status and voting rights of indigenous people changed over time in the United States? Created by Kimberly Kutz.

What is the citizenship status of people who live in the US territories and District of Columbia? Created by Kimberly Kutz.

An overview of Civic life, private life, politics, and government. Created by Kimberly Kutz.