I remember my 4th grade teacher having us read one page about the Daughters of the Confederacy, the teacher briefly discussing the struggles of former slave-owners, and skipping the rest of the chapter on slavery due to "not having enough time." IIRC, even the textbook painted the Daughters of the Confederacy in a positive, or at least neutral light.

I remember my 7th grade health teacher showing us a Christian anti-masturbation video for our sex-ed requirement. This was a rural public school in a northern state. Only other option was a private Catholic school, but my family wasn't Catholic, and my family wouldn't have been able to afford to send me there if they wanted to.

I don't think I even knew about the trail of tears until the middle of high school; and definitely didn't learn about the motivation for hunting Buffalo to extinction.