Earlier quoted context omitted.
In US, each school district receives money proportional to their students, with some places raising money via levys or bonds in their district. It takes a long time to make new schools. If people could go to any school, you'd overwhelm some districts with tons of students and you can't just make a new school in a year or two, it takes a lot of time for the district to figure out they'll need one long term, raise the…
OK, so build low-income housing in rich districts (unless you are saying the presence of poor kids destroys the good school) and stop using zoning to limit what kinds of residences can be built (lot-size, multi-family, building height, etc.). In the suburb of Saint Louis where my wife grew up, each lot had to be at least 1 acre, and had to be single-family. Given how expensive it was to live there, realistically the…
There is some lower income housing, but in a boom town like Seattle you get a second negative impact on poorer people, which is displacement through rising prices of homes and apartments. Poorer people have to leave because they can't afford rising rents. Their old neighborhood starts to get more of the better educated people who could help the local schools with their background and money.
It's not impossible to go up, but it feels like it is harder. In my family, my grandparents were both some of the first people to go to college during the great depression, with basically no money. They came from tiny high schools but managed to make it.