I am confident that this reply will be highly offensive to many, but as a teacher I have experienced this situation. The inner city children (from Phila) brought their cultural ways along to the suburban school district--which had been touting itself as one of the top-performing districts in the state. Whether the change of school benefitted those newcomers I cannot say; I can say that it offered considerable disadvantage--culturally as well as academically-- to the children whose parents had chosen to live there, and to pay high real estate prices, and taxes for the sake of the quality of those schools. Colleagues more in touch told me of these kids publicly discussing their trips home on the R5 (the suburban train line), showing the timetable to each other. I.e., they were not residents of the town and were free-loading on the taxpayers.