Not an American, but I've heard this sort of thing talked about. Not sure if it's a federal or state thing, but the general idea is that schools are funded by the taxes in the local school district. To be able to attend a school, you need to live within its district (there are exceptions to this, blah, blah, but you get the general idea). This is one of the reasons you hear Americans talking much more strongly about wanting to move to an area for the good schools - wealthy neighborhoods tend to have the better schools because they're better funded, etc. If the school districts get arbitrary changed, there's a good chance that you're going to be forced to attend a different school, with a different level of funding, etc.