This post can be found on the Resources Page under the "Service Groups" heading. If you would like to share a Service Group please contact me on twitter or Goggle+.
The StoryCorps is a group that is dedicated to finding, sharing, and archiving the voices of Americans with all backgrounds and beliefs.
This is just one way of many to teach diversity/culture.
They highlight great clips that tell stories in a few minutes that really caught my imagination.
StoryCorps has a few different initiatives that you can find on their website. One past initiative was the National Teachers Initiative where you can find stories about teachers and students.