No child left behind, went from getting the child help 40 years ago, to now just blind eye and not rocking the boat that will get you fired instead.
And problem stems from not the school level, not the school board level, but the elected commissioner of education for your state at the top of the pyramid; and which they got their marching orders coming in office, with the entire state funds for schools well under funded to start with. So what used to be get the child extra help so they would not fail, has just become pass the child until they are 18, and the state not longer has to pay for their education.
What to solve the problem, rip your kid out of public schools, since does not matter the state with all the states public schools are dumper fires, and go find a private school to put your kid in instead.