My opinion about the math is that they are over complicating addition and subtraction mastery. He has come home with worksheet questions that convolute simple analysis problems with extra unnecessary steps and allow zero flexibility. That is another rant- but I think it may be at the root of our math problem.
I think he's checked out, uninspired, and befuddled about why a simple problem like "how much money did Susie have left after buying 2 bags of jelly beans"? requires so much work.
At home we've mastered long multiplication, plowing through long division with remainders, and starting equivalent fractions.