[porridgeraisin]

> parental involvement

This is the _most_ important thing. Parents keeping a laser eye on their kids' performance in school, and having their own standards that the school must live up to, regardless of what commitees and boards and suits and academics and "experts" say. Even if it's just a standard for math competence. If the school isn't up to the mark, either pull up the school for it, or switch schools, or after school classes if it's an isolated problem. Many would be surprised at how many parents either can't(common in first generation educated) or won't do this.

> Spending has no correlation with success

In a setting where more spending is for more labour (when the labour is not done by parents/family) this is not true. Primary schools giving individual attention to students for example will do better than those with 100 students a class. But in most cases, more spending leads to more unnecessary flashy stuff. So in the real world, what you are saying is true.

Charter schools like yours are also sorely needed in america where math standards are absolutely woeful compared to RoW.