I can't tell if you're playing devils advocate, but in Texas, many students speak Spanish as their first language, we also have students and other parts of the country whose first language is not English. Some of those make up the majority, if not overwhelming majority, of some of these schools. I think it's naïve to assume that they can be taught the same as the rest of the country. There's also students with attention deficit, hyperactivity disorder, autism, disabilities, and all of that is best handled the local level so they can serve the local students. I get why some people prefer federalism and education, it allows for greater federal control. But clearly it's a disservice to students, or else the testing would show it.