This may not be the rest of the story, but it is an update...

My son does pretty well in most subjects. I didn't mention before that he is deaf, though he does have cochlear implants. So, hearing is no longer a problem, but complex language can still be troublesome.

I don't think he's "messing" with me, but I do think his mindset has a lot to do with it. We do math with his younger brother, who comes by math very easily. I notice that when his brother has an off day, he suddenly has much stronger math skills.

I have been using the abacus more, and I can see some improvement. I wouldn't say the problem is solved, but it has only been a couple weeks, so I'm encouraged. Thanks again for the insight. Hopefully with some games this summer, he will be more on-track before we begin Level C.

Blessings, Amy