One thing C is a little weak on is combinations. He gets them, just slow. I thought he'd struggle with multiplication and division but he seems to understand it pretty good.
One day K and I set up a "trail" of cards around the house as a fun way for C to review his combinations. He thought it was fun. K had fun setting it up. And I was happy cuz he was reviewing while having fun. At the end, we all got candy. Oh the benefits of homeschooling!