Hi snowgirl. I think your age estimate is off. I was 10 in grade 6 with one grade skip with a midyear birthday.
And I can understand wanting to push acceleration on the academics but you do hit that wall of puberty and lots of other stuff going on.
Lang Lang talked about how hard it was for musical prodigies when they hit puberty and most stop performing because they just can't handle all the stuff going on emotionally etc. He said he barely made it through as a performer. Luckily these kids have each other. Though it doesn't sound like there are at the level of Kit Armstrong who could scored perfectly on the SAT at 10.
Ren