There are thousands of resources on oppression and racial/ethnic oppression in particular. Here are a few:
The Southern Poverty Law Center is located in Montgomery, Alabama, the birthplace of Juliette Hampton Morgan. This organization was founded by Unitarian Universalist Morris Dees and Joe Levin in 1971. It is internationally known for its tolerance education programs, its legal victories against white supremacists, and its tracking of hate groups. You can subscribe to Teaching Tolerance a magazine for educators.
Movies and books
Classic films and books that deal with racial or ethnic oppression include To Kill a Mockingbird and 12 Angry Men.
Tatum, Beverly Daniel. Why Are All The Black Kids Sitting Together in the Cafeteria? New York: Basic Books, 2002.
_________.Can We Talk About Race? Boston: Beacon Books, 2008.
Thandeka. Learning to Be White: Money, Race and God in America. London: Continuum International Publishing Group, 2000