DS9 is running into issues in math (6th grade) -- which has always been his favorite subject (after gym class). We're watching him do what I would call story problems and he doesn't seem to know the terms -- that is, how to tell whether to add, subtract, divide, multiply. Nor does he know how to divide decimals. This is of course showing up in his grade.

DH showed him some Khan videos but that's confusing DS as it isn't a Common Core approach. Suggestions for helping him get through this? Do we approach the teacher for extra help (she offers it)? Is there a good online guide that won't confuse him more?

Feeling awful that we didn't know this was happening. He has been doing his homework at school and turning it in... without us seeing it.