Ranking Private Schools

I can review the test score rates of public schools, but what do I reference to determine the rating of specific private schools? Do they report to specific agencies? How do I best determine whether the private school has a good rating and is worth it? Please advise. Thanks!

My reply:

It’s futile to rank private schools. There’s more to them than test scores. More here

If you are beginning to look for a private school, start with Choosing a School 101 and work out from there.