https://en.wikipedia.org/wiki/Abbott_district
The difference in math proficiency for Abbott students vs. non-Abbott students has stayed roughly the same, while thr language proficiency gap has actually increased.
Resources means teachers qualified, able, and willing to teach in those areas. That probably means paying them more than a similarly qualified teacher in an area that is currently doing better and hence more attractive. But it also means finding head teachers (principals in the US?) who can inspire the whole school, staff, pupils, and parents. Such people are not thick on the ground. And then you have to have stability.
Mere money will not do it, everyone has to work for it.
Contrary to what is often said, there is no shortage whatsoever of funding for public schools in urban areas. New York City spends more per student than anywhere else in the US. <https://www.silive.com/news/2019/06/how-much-does-new-york-c...> Baltimore, an incredibly poor and run-down city, spends the third most. #4-6 and #8 are all wealthy suburbs of Washington DC, but their schools are all far better than those of Baltimore or NYC on average, despite Baltimore spending slightly more per student and NYC spending 60-70% more.