Economic models are a way of taking complicated ideas and events and breaking them down into their most important characteristics. We use models in economics so that we can focus our attention on a few things instead of getting bogged down a lot of details. In this video, learn more about the role that models play in economics, and the importance of the assumptions that underlie those models.

Learn about how to represent a monopoly market graphically in this video. Topics covered include the profit-maximizing quantity, pricing decisions, and deadweight loss associated with monopolies.

An important skill in microeconomics is the ability to find a firm's profit. Learn more about how to use a graph to identify the profit-maximizing quantity for a firm in a perfectly competitive market, and identify the area that represents the firm's profit or loss.

Accounting profit is what many people tend to think of when they think profit, but an economist would say that you leave something very important out when you do so: opportunity costs. In this video, explore the difference between a firm's accounting and economic profit. Created by Sal Khan.

Economics of a simple business leading up to a discussion on inflation/deflation. Touching on income statements. Created by Sal Khan.

Economies of scale exist when long run average total cost decreases as output increases, diseconomies of scale occur when long run average total cost increases as output increases, and constant returns to scale occur when costs do not change as output increases.

Students will view this slideshow online as the first activity in a blended unit. The activity is meant to introduce the author and some of his works, including several that the students will read as part of the unit. It is primarily intended to spark student interest in the unit. However, it will also aid the students in that they will be better poristioned to read the author's works if they have some sense of what to expect in terms of themes.

     The choice to include such as introductory tool into the unit was based upon prior observations regarding the difficulty of getting students engaged in any lesson when nothing had been done to sprak their interest beforehand.

In this video produced by ThinkTV, explore the effects of land masses on local climate conditions, and learn about regional impacts of land-atmosphere interactions.

In this video segment adapted from NOVA scienceNOW, scientists examine the link between rising sea surface temperature and more intense hurricanes.

Introduction to the egg, sperm, and fertilization. Created in collaboration between the Association of American Medical Colleges and Khan Academy.

A deep dive into the Eighth Amendment, which protects citizens from excessive fines and cruel and unusual punishment. In this video, Kim discusses the Eighth Amendment with scholars John Bessler and John Stinneford.

This video, adapted from NASA, presents rare experimental evidence from the Fermi Gamma-ray Space Telescope supporting Einstein's prediction that space-time is smooth.

Conviértete en un detective para resolver el Caso de la Mochila con Mal Olor! Actúa las pistas y saca conclusiones para resolver el misterio.

Cuando el detective Bentley no puede entender por qué su mochila huele mal, recorre los acontecimientos de su día para encontrar pistas. Asumiendo el papel de detectives, los espectadores representan los eventos del día de Bentley y usan pistas textuales para resolver el caso.

Objetivo de Aprendizaje:
Sacar conclusiones de los hechos presentados en el texto y respaldar esas afirmaciones con evidencia textual.

Can you imagine a party where you celebrate dead people? This festival is celebrated in some Latin American countries, including Mexico, whose tradition of placing altars for the dead is world-renowned.

¡Aprende sobre los logros de George Washington, Eleanor Roosevelt, el Dr. Martin Luther King Jr. y Dolores Huerta actuandolos!

Sawyer, un estudiante de la clase de historia, se imagina que presenta un programa de entrevistas con los invitados George Washington, Eleanor Roosevelt, el Dr. Martin Luther King Jr. y Dolores Huerta. Cuando Sawyer entrevista a estas figuras históricas sobre sus logros, los espectadores actúan frases que representan cada uno de sus legados.

Objetivo de Aprendizaje:
Identificar las contribuciones de las figuras históricas George Washington, Eleanor Roosevelt, el Dr. Martin Luther King Jr. y Dolores Huerta.

David explains what it means for a collision to be elastic or inelastic. Created by David SantoPietro.