86% of my wife's students that start kindergarten with her finish Grade six at her school. This is the highest grade in her school. Many of her former students that went to her school who are now adults send their children to her school. This is pretty strong proof that at least her private school is doing the job well. I have talked to many students that go to the local Christian private school to learn English and I've been impressed at their language ability. Many of Yris's student leave to go to school in the USA where they do very well in school. Dominicans, especially poor ones, wouldn't spend their hard earned and valuable money on a private education if the public schools were as good - no further proof needed.
I completely agree with Bob. Why would poor people spend the little money they have in private schools if the public school system were any good? Doesn't make sense.