I haven't been there, but I have several teachers in my family and they have always said that it helps when the parent's provide a way for them to, because the spread is so large in their classes. So I would suggest asking the teacher if it would be okay if you provide high level math materials for him to work on in class during math time if that is an option. Good luck.

DD6- DYS
Homeschooling on a remote island at the edge of the world.