An introduction to Convex Lenses. Created by Sal Khan.
Some Convex Lens Examples. Created by Sal Khan.
In introduction to Convex Parabolic Mirrors. Created by Sal Khan.
Understanding alternate coordinate systems. Created by Sal Khan.
Core spiritual ideas of Buddhism by way of comparison with ideas from the Hindu Upanishads.
Understanding how most corporate debt is different than most personal mortgages. Created by Sal Khan.
Why people set up corporations. Created by Sal Khan.
Correcting the time difference calculation by taking into account that there is no year 0. Created by Sal Khan.
Understanding why correlation does not imply causality (even though many in the press and some researchers often imply otherwise).
This video from NASA features the Cosmic Origin Spectrograph (COS), which allows scientists to use spectrographic analysis to assess the composition of intergalactic material.
Cosmic Background Radiation. Created by Sal Khan.
Cosmic Background Radiation 2 - Redshift of the Cosmic Background Radiation. Created by Sal Khan.
An introduction to the Cosmological Time Scale 1. Created by Sal Khan.
An introduction to the Cosmological Time Scale 2. Created by Sal Khan.
This is a pre-teaching Costa Rica quick unit. I used this to teach students about Costa Rica before reading the short novel "Robo en la Noche." It includes information as well as interactive activities.
Benefits and drawbacks of modern political campaigns in the United States, including consultants, campaign costs, and social media.
Learn about how firms determine the optimal combination of capital and labor in this video.
A real-world example of the concepts behind the AD-AS model is the oil shocks the United States experienced in the late 1970s. In this video, we break down some of the events going on at the time and use the AD-AS model to see if our predictions using this model match what really happened. Created by Sal Khan.
A real-world example of the concepts behind the AD-AS model is the oil shocks the United States experienced in the late 1970s. In this video, we break down some of the events going on at the time and use the AD-AS model to see if our predictions using this model match what really happened. Created by Sal Khan.
In this video excerpt from NOVA, find out how whole genome sequencing saved the life of Alexis, a fraternal twin who was originally diagnosed with cerebral palsy but, in fact, had an even rarer genetic condition.