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…
The government also tries to help poor students by boosting funding for schools that have poor parents. Schools are ranked into 10 deciles[3] depending on the income of the parents, with an equal number of schools in each decile. The government gives out more funding to schools with poor parents (decile 1), and less funding to schools with rich parents (decile 10).
The academic results of students are strongly correlated with how well-off their parents are[1]. Attendance and other factors are correlated as well[2].
[1] https://keithwoodford.wordpress.com/2012/09/24/socio-economi...
[2] https://figure.nz/search/?query=Deciles
[3] https://www.education.govt.nz/school/funding-and-financials/...