Earlier quoted context omitted.
The US may spend a lot of money on education, but there is an underlying problem that isn't addressed in either your comment or Phil Greenspun's argument. K-12 education is primarily funded through property tax. This results in wealthy communities having great schools with tons of resources and poor communities that are using decades old resources and schools that are falling apart. So maybe you are correct in saying…
DC is regularly one of the top 3 school districts in the country in terms of per pupil spending. I don't think you would want to send your children there. There are fundamental incentive problems with public monopolies. When you have a group of dedicated, wealthy, involved parents, these negative incentives can be overcome. However, the system fails your average person, and it surely fails those who need the most hel…
I'd go further and say you don't even need the wealth -- just dedicated and involved parents. Success will flow from that. Trouble is, it's a vicious cycle: the kids who need the most help often have the least dedicated and involved parents.
People claim that private schools are better than public for all sorts of reasons, but I think the main reason probably is that the parents who care enough to put their kids in private school usually also care enough to be dedicated to and involved in their child's education.