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.

Tony the crossing guard explains how he helps children cross the street as a crossing guard, and why it is important for safety.

The narrator describes Harold's daily routine during the weekdays. From the beginning of the day to the end of the day, he follows a consistent and precise schedule. This clip is a concrete starting point for discussing how writers reveal character traits through concrete actions and specific detail.

This clip explains how to solve 2-step equations using the reverse of PEMDAS.