These are issues a bit beyond the ken of educational technology, but there are three resources here I think people should at least see. This first item is a paper (68 page docx) arguing that "a complex set of evolving barriers continues to impede access to the equitable delivery of education for racial minority K-12 students in the U.S." The gist of the argument is that treating everyone exactly the same entrenches existing socio-economic, racial and cultural disparities in society. Essentially the same point is raised in Paul Gorsky's article, Stop Punishing Poverty in Schools. "For many students experiencing poverty," he writes, "being priced out of inclusion is only the tip of the inequity iceberg." The third item is a warning, I think, about what happens when you don't emphasize a diverse and inclusive public school system: David Gilbert's look Inside a US Neo-Nazi Homeschool Network With Thousands of Members. Is this even real? I don't know, but it serves as a stark warning.