DS5 is in K, which is relatively academically "advanced" for our area.

He can add and subtract three-digit numbers (and probably beyond). He understands the concept of multiplication, but he doesn�t have the multiplication table memorized.

He has asked me multiple times why the school math homework is so easy. His math homework is mostly number printing, pick out the largest/smallest number from a bunch of numbers, etc.

How important is it to mention to his teacher his ability?