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The lecture at the Norman, Okla., high school was intended to heal the racial divides, a student said.

The discussion’s premise: White people are racist.

All of them.

Following that discussion, an Oklahoma teacher is under fire and a high school is mired in the debate about how teachers should inject themselves into conversations about race in the United States.

NBC affiliate KFOR reported on the controversy last week after receiving a recording from an offended student at Norman North High School.

In the recording, the teacher shows a YouTube clip about imperialism. A man in the video uses white-out on a globe to illustrate how European influence spread across the world.