Actually, I don't think she can, unless she's willing to send them to someplace at least 3 hours away. Local School Districts here in central PA have been very successful at keeping competition out. There are very few private schools - the catholic school just started going past 6th grade a couple years ago, and I heard the Christian school closed. No other private schools past 6th grade, because PA law makes it very onerous to have middle or high school as a private school. I've often suspected that the local school district is quick to report the few private schools we go have, for infractions of rules that the public schools don't have to follow...
Then may I gently suggest that, if insulating her children from all things Christian is her goal, she move three hours away?
2. Boarding school.
> If she wants her kids in a school with heavily Jewish influences, she should either move or, better yet, homeschool her kids, as many academics that I know do.
I don't think it's a state thing. I'm in the suburbs of Philadelphia, and we have lots of private schools, including a bunch of Catholic schools. There's a big Catholic high school not far from me
Part of it might be the large Italian community that was originally rooted in Philly, but has moved to the suburbs. I don't know of any Yeshivas around here, but the Philly area never had a huge Jewish community like New York does