That sounds really great!
My son has asd and was in a very small classroom of 14 students, but with no aids and some kids with serious behavior problems and an overwhelmed teacher. Differentiation simply meant harder math worksheets. My son and other kids were being bullied and did not feel safe.
In a class of 14!
Class size is definitely not everything, but it is one factor that can allow teacher to successfully teach or impede that ability.