I suspect that government schools in the South teach the same history as they have been teaching in Kansas for a long, long time. Our Founders and Confederates were right and the Republicans were wrong. Today's Democrats recognize the Republican victory in 1865 as righteous so they can't be real Democrats. Republicans and modern Democrats - both claim to be the Party of Lincoln.
https://www.abbevilleinstitute.org/blog/kansas-university-honoring-war-criminals/