A food supermarket district as a model
Compulsory education is an interesting concept; it is laudable yet largely unattainable. How does one force another to become educated? We certainly can make them sit in a chair, but the rest has to be up to them. But, I digress ... my point is that regardless what our philosophy may be, our public K - 12 system has serious structural problems. Throwing money at a flawed system typically is a losing strategy.
This article does an excellent job showing at the highest level the basic structural problem.