I saw this video in college, and I immediately changed my major. The payoff at the end is brilliant and a perfect metaphor for what we deal with and face every day in our society. Like "Catcher in the Rye" is to high school students, this is part of your Upworthy required reading.
1:30: This teacher begins a study that will be talked about for 40 years.
3:00: She re-creates segregation and racism in her classroom.
7:45: Mrs. Elliott flips the entire class on their heads.
10:00 Jane Elliot makes the most profound discovery about us all
11:43: The students learn something that the world is still struggling to.
There are too many great moments to point out. Just watch.