Thank you for your response @cinnamon1212
A good music program means a school with a high standard of instrumental music tuition and good links to a conservatoire if possible.
I gathered from a different thread here that there are schools that offer one to one or group academic support where students need additional help with academic work. So I guess that would mean scaffolding per your description.
I have two daughters - the other is 10 years old and not yet high school age. So our thinking is that we probably find a neighbouring private day middle school or a day school that offers grades 7 - 12 so both girls are in the same school.
Ideally, we want both girls close to each other but mindful older sib will want to board in grade 12 if she starts off as a day student.
They are both currently in a mid-size (for the UK) private school (about 800 students across elementary to high school).
We would prefer similar in terms of school size as want the benefit of small class sizes.
Location wise, we really aren’t decided yet. My husband is exploring a PhD at schools around CT/MA - so we could live and have the girls in the same or neighbouring day schools in these areas.
We have friends and relatives in PA, TN and NC. And we would consider having day/boarding options close to family given older sib definitely has to transfer next year after her GCSEs here. We could relocate with younger sib in Jan 2026 if necessary.