My ds7 just took the WISC IQ test and there was no math questions in it. In a couple months, he will be taking the achievement test. I asked my psychologist what I should do to prepare him. He said just review the topics of math with him.
My ds was way ahead in math before KG. Just like your son, he did not learn anything in KG and I did not push it. In first grade, I couldn't wait for the school to differentiate, so I started supplementing him. It took me at least few weeks to bring him up to speed.
