Are there any schools in the city that show flexibility and invest efforts in meeting kids where they are? That are open to the idea that if a kid has mastered a subject, they do not need "enrichment" in it? Not looking to debate whether this is a good idea, rather to collect info. I know Speyer and Basis will come up, I would like to get an understanding of their philosophy. Others? Is it possible for an elementary kid to get access into MS level courses, for MS to access a variety of HS courses?

I've heard Success Academy will accelerate and skip grades.
Thank you, yes, I've seen this as well.
FWIW my understanding is that regular G&Ts (not Citywide schools) will NOT accelerate, at least in my district (D3).
Yes, that's the general direction for all district G&Ts. FWIW, we started in CW school, and although I'm giving a pass for Covid for now, I'm not impressed by the curriculum.
@AnonymousQ which CW?
@Anonymous Yeah, would like to know too because I had one child in a CW for middle school and one in a "coveted" D2 middle school and the CW was FAR superior academically than the D2 school.
I can't speak to your question specifically, but in my experience it is only smaller schools which lack resources and have less need for uniformity in rules that will allow this. Once a school is larger, it has the ability to have tracks within a grade, and that is seen as sufficient. Likewise, a larger school has a greater need for uniform guidelines (why should Sally not get an opportunity like John, etc, which can just become unwieldy). Also, isn't there that public school associated with Columbia which allows you to take classes at Columbia?
You're probably right.
Not to be snarky, but help me understand the goals of such acceleration. If you finish Calculus in middle school, do you go onto Linear Algebra and Differential Eq in high school, then grad-level math courses in undergrad? Unless you become a mathematician or maybe a theoretical physicist, when will you actually use all of this?
presumably if you're that advanced in math, you will use it in your life.
You could do other things. Learn an additional language, coding, music, whatever.
@Anonymous How many jobs use such advanced math?
If you're talking math specifically, Basis lets students accelerate in math. They can take a test over the summer. They have minimum levels (if you're in grade 7 you must be in at least Algebra 2). My friend's DD had a 7th grader in her calc class last year.