I have evidence. In Texas we just received our school's scorecards. They show, at an aggregate, how my school (and district and state) performed at the annual exams for 2019 and 2021. The scores are broken out by some different demographics, such as: race, poverty, and disability.
As GP mentioned, the standard scores for black people, disabled people, and poor people dropped by more than the average. I had my eye on disabled people - and I was disappointed in the change!
So the current system is failing minorities and your response is let’s give this system more money, not I wish I could have my children educated by a more capable organization?
The wealthier parents hired private teachers and the kids didn’t miss a beat. Even the middle class parents just split the cost across 5 kids and they did class in the park (to align with restrictions).
The poor parents? Well they can’t take time off their jobs or work from home. So they scrambled to find someone willing to watch their kids do online learning. It started with a couple hours per day and now those kids are at least a year behind while their middle-upper class peers and right on track.