While teaching salaries vary greatly from state to state, child education is improving from the under paid teachers of the past 10 years. It is sad to realize that dollar signs may limit child education if you happen to live in a state with low teacher salaries, or where the states schools are short on teaching funds.
Another aspect which limits child education in the public school system, is the unfairness of the teacher hiring process. You would think that your school would want to hire the most qualified teachers, but that is often not what happens. The way our schools are set up, it is possible for an individual to control who gets hired and who does not. And many times has a vested interest in the outcome as well.