Public schools suffer from all the ills that central control is known to visit on citizens. It's what happens when you let government make consumer decisions instead of the market, in this case, parents.
If you really want to repair public education, you would phase out the Department of Education, its state counterparts, and local boards of education. Take the money you save to phase in commercial school-rating services and open vouchers for all students.
Parents would send their kids to the schools that educated as the parents wished, whether the focus is college prep, vocational, basket-weaving, or French literature.
Quiz: What fraction of parents would use their vouchers on the typical government-run, urban high school?