Everyone already knows about the American Revolution and the Constitution, right? Why bother teaching them? Well, they should be taught because they changed the world and are a live subject for debate in our present lives. So too is the history of African Americans, highly central to United States history (the fight over slavery was at the crux of most major government struggles over at least the forty-plus years before the Civil War, the greatest war in our history. The great upheavals after the war up through the present day were so often tied to African Americans, from the Compromise of 1877 to segregation, Jim Crow, the civil rights movement, and Black Lives Matter. The notion that any of those things shouldn't be taught is ludicrous. Nothing should be taught as propaganda in the way that DeSatan wants the Constitution taught. They should all be taught critically from many sides in historical context and with contemporary questions. To ban teaching any of those subjects is to ban teaching against them (e.g. if you don't like the notion that race and gender in their intersection lead to different ways of thinking about both, then teach about it and what problems there are in this way of approaching the subject). It makes us all impoverished.