St. Anthony's school is amazing. They are the only private school in the area with now over 10 after school activities, plus after care for business parents plus, the academics of the school are not to be beaten. The teachers are amazingly dedicated and there are many non-Catholic children in the school -- very diverse education which is why I put my children there. A 100% go. Nanuet is one of the best public school areas but the class sizes are getting a bit too large for us.
I'd go and look at St. Anthony's. The kids have gone onto great high schools with ease -- including the public schools around and have been very successful. St. Anthony's has a great reputation in the county.