Private school is a big blow job for people that think little billy and Cindy are special. It is a homogenous environment that does not expose them to the worlds diverse social strata. This is a social world first and unless you learn to navigate in that world you will not be successful by any measure. Public schools are the only place that mirror the real world socially. So put your kids in a public school and augment their education in other ways . Recent data suggests (surprise) that parent involvement in education is the most important factor in a child's academic success. There is more to life that your grade point and which school you attend and success is defined by your goals in life not your possessions and bank account.