This sounds like that old paradox where each part of a ship is changed. At what point is it a new ship?
I think I recall other TT schools (can't recall which one(s)) saying it was around 70% of the original class that remained through graduation.
i can't answer for Girls schools but i have found at our school it's maybe 60% but it could be 80% in some grades and 50% in others. K - 12 is a long haul. Many people move, financial situations change, a number of kids leave at 2nd grade when learning differences are uncovered. A number leave in middle and upper when they may seek a different environment (SS to co-ed, progressive to traditional, or the opposite, more or less challenging, some go to boarding schools, some switch the Specialized schools).Schools also change and may introduce new programs or leadership that families don't agree with or that changes what they signed up for at the onset. I'm not sure what the overall number will tell you. If you're wondering how many get counseled out for academic reasons, that is a different question.
Apropos of the Dalton vs Brearley post, as I recall at Dalton it's pretty high (80%+?), whereas at Brearley someone mentioned it's pretty low (~30%?). But I could be completely wrong.
@Anonymous Dalton does seem to have high retention, maybe highest of all schools? For all the heat it takes on this board, that stat definitely says something about the school.
@anonymous I'm convinced that the vitriol stems from the fact that, among the TT, Dalton is probably responsible for the highest number rejects of DCs of moms on UB and this board.
Babby told us 70% of D grads start in kindergarten
I have hard the 70%