This clip illustrates that the absolute value of -1 is 1.

The Stanley Milgrim experiment is a series of radical experiments that test the willingness of individuals to obey authority. Individual variables are changed in order to determine what influences the test subjects. In nearly every case, the fundamental result is the same.

The MythBusters test the myth that talking to plants makes them grow better. They set up several test groups of bush peas, and all are under the same conditions except the type of sound to which they are exposed.

Rochelle attempts to help Chris with Algebra, but her overly critical teaching style makes it especially difficult for Chris to learn from his mistakes.

Mr. Collins introduces variables to the class using a venn diagram example.