To the OP. Fuel the fire and work on his perceived weakness.
I know nothing about boarding schools. But have an engineering junior at Michigan. He finished math with Multivariate Calc (Calc 3), in high school.
Math, stem kids are notorious not great at writing. I just know too many kids of both genders this would apply to. I also have a right brain and left brain child
They are so different. All in a good way
So it would be horrible to take math centric kid and stick them into a writing centric school if that is your question. Of course a balanced school would be best. But…
For my son he challenged himself since he knew writing was his weakness. He took as 2 of his 8 APs, the AP seminar AP research sequence. It’s a 2 year program that changed his life according to him. His school was #1 in our state and only took 12 kids for it. He actually fought his way in. (figuratively).
He did a large research paper on Augmented Reality and it’s use in medicine. Became a really good writer /researcher. First year college writing was a breeze.
At Michigan they said something to the engineering students that struck a cord with him. Maybe your son should hear this now. They said “stereotypically engineers are not good communicators. To those that will stay that way you will be part of a team. That is fine. But to those that become good communicators /writers… You will lead that team”. So the introverted type kid that went to college is no longer and actually a really good writer/communicator … Lol…
Fuel his interests so he doesn’t get bored