The article didn't directly address private v. Public education, but rather that our teacher preparation methods are crap. You may be able to argue those who graduate from the best programs for creating educators may be skimmed off the top by the resources a private institution hasavailableto them in terms of provided salary and other issues, but the more direct issue is that teaching is hard.

One may be an expert in ones field, and not be a teacher. Saldly one may be a teacher, but over the years we've also gone and built a system which actively discourages teaching.

So the issue isn't necessarily one of money, but of how we approach the problem of building teachers.