I would go and talk to the 1st grade teacher and probably try it. I would see it as a step in the right direction. At the very least it's an acknowledgment that your son is ahead of his class and may need more. Hopefully he will prove that he can work on the 1st grade level and you can then use it to your advantage.

I would be quite angry about his K teacher too. Most of her comments were plainly off. Try to ignore it if you can or perhaps prepare good replies if it ever comes up again.

LMom