I wouldn't hold him back unless you had some very specific social concerns
I wouldn't hold back even if you had very specific social concerns.
We have among our children a very young-for-grade autistic 2E and an extremely young-for-grade 2E. We recently received an apology from someone who insisted that we hold these kids back-- she now realizes she was utterly wrong about that.
If there are social or behavioral concerns, you work on them as a major priority. But you don't want to create an academic mismatch in the process. A held-back kid loses a year of working on those concerns because he's not in the environment where the skills will be stretched.
That said, if you are permitted to go observe in K classrooms, you should. If it's academic K, it may be a poor fit anyhow. If it's a playroom K or some kind of mix, it could work. But you need to find out what goes on to assess the fit.
