I'm trying to come at this from a neutral position, but I realize that's not always possible.
Our history curriculum is very much whitewashed. Unless a teacher deviates from the state-provided curriculum guides, there's no discussion of the Tulsa or Fayetteville atrocities. Textbooks tend to contain black and white images of the Civil Rights era despite many of the photographs being available in color, making it appear further back than it was. There's no mention of most Confederate monuments being erected in the 1900s as deterrents to black migration during and after Reconstruction.
I'll admit it's been a couple years since I've had my head in multiple states' curriculums, but these omissions were pretty common. And I don't recommend their study as a method of shaming, but to demonstrate how progress is possible when we start to work together.