What's the Root of the Problem of Native American History in High School?

LZ Granderson: Americans have never been fully convinced of history's place in the curriculum. 60 to 70% don't study much history after high school, he says. LZ: There's a real effort to create a new birth of the United States. It came into, if you look at what's studied in high schools,. You find out that the Native American history just isn't dealt with.