1: Only 8% of students understand that slavery was the cause of the Civil War.
2: Here is a book that destroys the myth of the Alamo, and points out that the white people in Texas went to war twice to keep the institution of slavery.
3: There are lots results for problems with the way native history is taught in the US. I grabbed an interesting read as an example. As further evidence, until a few years ago, the Washington NFL team used a racist slur as its name