I don't think you should expect a mainstream private school to provide support. With the small class size, the teachers MAY be able to give accommodations, have a bit more time to work on one-on-one academic needs, communicate with parents, etc. However, socially, after a couple of years in the same small group group of kids, your DC might get bored. I'd suggest talking to the school directly and be honest on your DC needs and what kind of expectations do you have from the school.