There are so many topics that are hard to talk about nowadays without getting into politics but politics and structural inequality are at the core of this. For the benefit of non-US readers, know that how the US funds public education (K-12) is rather unique. It's done through property taxes essentially. Depending on your state and city your property taxes can vary a lot with the same value property. But what this me…
We still have so much culturally ingrained bias that we can't update policy to set the stage for even the next few generations to close these gaps. And it's compounded by the current generation being asked to pay an unreasonable price (ie disappearing gifted classes) to put a band-aid on this gunshot wound of a problem which breeds resentment which sets progress back even further.