I had to watch this video about five times through my education career (twice in undergrad, three times in grad school). Some times there are videos they like to show that you are bored with after a while.
This one? Riveting. Every time I watched it. Not just the original experiment with the children, but also (especially?) the segment where she teaches the class to adults.
PBS has put it up for free!
One day in 1968, Jane Elliot, a teacher in a small, all-white Iowa town, divided her third-grade class into blue-eyed and brown-eyed groups and gave them a daring lesson in discrimination. This is the story of that lesson, its lasting impact on the children, and its enduring power thirty years later.
(crossposted to my LJ)