Not sure if this applies to your situation, but from what I can see in the math books, the explaining of the material like addition, subtraction, number sense, and multiplication takes place over months! Weeks and weeks of each section. Depending on the teacher/class/school, the unit tests expect answers that are only related to that unit. It is not assumed you know other things. I've found the unit material so very broken down, even I didn't know what it was asking any more. How to add or multiply is chopped up into such tiny chunks... (sigh)
I tried playing a game with my DC. Pretend the teacher is a 3 year old and you have to show the teacher how to do the math.
Sorry. I'm not much help. But I hear you.
