This article mostly talks about the bay area (and slightly mentions national studies), so it seems that they were mostly studying the case were most students we

This article mostly talks about the bay area (and slightly mentions national studies), so it seems that they were mostly studying the case were most students were already meeting a sort of baseline. From my personal experience, I think that separating kids in lower income areas leads to positive experiences. Before being in the gifted program, my classes were often interrupted by fights and stuff that was more fit on world star.