Yes, he is officially one grade accelerated. But most kids whose birthdays are in the fall are redshirted around here. DS' best friend (who is two weeks older than DS) started K this year. DS has a late November b-day; the cutoff is Dec 2.

I think it's too early for another full skip. Writing would be an issue. I'll revisit that in a year or two.

What about the writing issues (number reversals, difficult to write small) with regard to doing math a grade up?