at least according to him, has been enjoying his math class.
he is getting frustrated in class and that she doesn't think that its good for him. She suggested that 1st grade math would be a better fit because they're more likely to be at his "comfort level".
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I am no curriculum expert but I'm pretty sure he won't be learning much in a 1st grade math classroom considering he already knows multiple digit addition and subtraction and carrying, basic fractions, and has been learning multiplication and division on his own recently lately.
Secondly, I know my child, and he is a massive perfectionist. If anything has too much risk or chance of failure then he will ooften just not try.
Math is not easy like a lot of other things. You are not supposed to be comfortable.
Its a good thing to get frustrated and then get it - especially if he is a perfectionist. That is normal. As long as he is getting it, then stay put. Based on your description of his skills, he sounds fine.
He may be getting frustrated with the teacher who may be wanting to go over and over what he already knows. If his skill level is expanding faster than the material he is being fed...
You may want to consider supplementing him at home with Singapore Math.
