If your daughter’s goal is to become a professional dancer in a top, classical ballet company, I’m not sure a traditional NE boarding school, even one with a strong dance program, is the right choice. The most serious ballet dancers on the East Coast will move to NY in HS for training at SAB and will postpone college.
Contemporary dancers have more flexibility. Most attend college. A boarding school with a strong program will suffice.
@Calliemomofgirls - It’s not impossible to stay on the pre-pro track, but it’s difficult. I think you compromise a lot by just going to a conservatory. But, if you want to know about Harid or MCB, you can PM me. We know both. We did a program with a choreographer from NYCB one summer and it was great. Also, SSDI - kiddo’s dance-mates attended for a few summers. Same with Jacob’s. We have a dear friend whose daughter was basically eaten alive @ ABT and is no longer dancing.
Advice: Please find a place that offers a healthy balancing act between dance training, physical-mental well-being, family support and education. If kiddo were to pursue professional dance, FWIW, I would have sent her to The Rock. IMHO, the girls we know who trained there had the best experience. However, if you’re considering balancing both the NE BS experience with serious ballet training, IMHO the students in the Dance Company at SPS had the best of both worlds - great dance training in ballet and great academics. You can always ask where their students ended up. We knew too many dancers in pre-professional programs that were home schooled and suffered later on.
Most classical dancers at top ballet companies do not attend college right after high school. It is very rare for them to go to BS, with the exception of the U of NC School for the Arts.
Here are some links so you can peruse the bios of dancers at three top companies in the Northeast:
https://www.bostonballet.org/Home/The-Company/Dancers/FullCompany
If your daughter is already a serious dancer seeking answers, you probably know a lot…I am not sure if you are from the CA or West Coast. Isn’t there a serious ballet academy near San Jose, CA? Seem to recall kiddo dancing with one in a competition a few years back. Some people look at awards presented to dancers in competitions from various programs or conservatories and get a sense of the level of excellence. Just so people don’t get confused or get tired of the obvious, “The Rock” is well known to parents (not only in the NE) who are seeking a top training program for their dancers. It’s in Philly. I knew the previous director/founder of the MCB and he liked dancers from this program before he started his own school. There was a mom on CC whose daughter was a gifted dancer who attended SPS is on the pre-professional dance track. We know girls who trained in the Saratoga Summer Program SSDI - had attended Emma during the year. We knew a girl from an elite NYC prep school who trained @ ABT from age 8 - 16…crashed & burned out. Too much to try to do that level of intensity academically and in dance.
SF Ballet is the west coast powerhouse company for classical (as is their training school).
Thanks @Golfgr8 and @CaliMex — I so appreciate you taking time to respond!
I feel like I’ve got a decent grasp on the ballet-only opportunities and am very happy with DD current pre-pro ballet program. But it is a daytime program which means some form of online or homeschooling. Where I was getting stumped was the intersection of academic BS and pre-pro ballet training. Your experiences and thoughts @Golfgr8 are in line with what I suspected — SPS will likely be closest to pre-pro. I hadn’t considered Andover (although my brother who attended Andover had suggested it), Deerfield or Emma. I’ll look into them! Thanks! I wonder if they will simply not be enough hours dance for DD taste. We’ll see — We are open to exploring the options.
A small clarification on my part @Golfgr8 — when I say DD isn’t a great tester I mean I am nervous about her SSAT and was wondering how much a solid dance audition would help her in the admission decision. I’m far less worried about her audition — we are used to auditions thanks to the annual craziness of summer intensive audition season every winter.
Oh and yes I know the rock well! We considered it for last year’s summer intensive and have known lots of dancers who loved it there. But yearround, it’s essentially online schooling academically (unless I’m recalling incorrectly), which is the case for many (most?) pre-pro programs attached to companies (like SFB or MCB or ABT ). The goal is: get done with high school requirements quickly — check the box and get back to the studio. Nothing wrong with that but the goals are just different. A small comment for the sake of anyone reading to learn — I would disagree that the most serious dancers all go to SAB. Yes it’s a prestigious school for sure, and every year our pre-pro program loses a couple dancers to them amdnits suoer exciting news to be invited there year round from the summer program. But SAB is a very specific style of ballet (Balanchine choreography based), and serious dancers (from the whole country) end up training at a number of top schools, both company affiliated and not, in a variety of styles. SAB is one of those top company schools (for NYCB in case non ballet folks are reading). But saying the most serious ballet students go to SAB is a little like saying all smart kids go to Andover (or PE or SPS or wherever). 
It’s just not possible logistically and not even desirable in terms of fit for many ballet dancers who don’t love that one very specific style of training.
Anyway — much to consider so I am grateful for the conversation.