I am the daughter of an educator. My father taught in a one room school for 3 years, then 5th grade for about 12 and 15 as a principal before retiring a few years ago. I can tell you that he had his reservations at first, but saw how well the kids were doing and how poorly the public school system was doing and turned to my way of thinking. I do believe, however that the biggest problem in the public school system is the parents and students. There is no longer any discipline, etc. at home or at school. It has forced the administration and the teachers to become "parents" in a way, and tied their hands behind their backs in the process so that they are unable to do the things they need to do. This and religious reasons are the reasons I homeschool.
I'm not that optimistic.
This is all the more reason to realize the money being spent is mostly just a waste.
In this region most the high schools have day care centers on the campus for the unwed mothers (mostly from Mexico) to bring their kids, huge amounts of money are being spent on drop-out prevention programs and a diploma can be had by attending just 3 years of high school --- still the drop out rate is very very high. It would be cheaper to just hand them their high school diploma in the 7th or 8th grade.