Chicago teacher Lincoln Brown was suspended for five days without pay for trying to teach his students about racism by discussing the original way Mark Twain’s Huckleberry Finn was written as an example.

Brown is now suing the school in federal district court for violation of his constitutional rights, and also because he thinks his career could be ruined for such an ordeal. The teacher said his 6th grade class was having a discussion on racial stereotyping, and “how that words really shape peoples ideas of who you are.”

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