Seriously, what about friendships? What about them being exposed to children's sophisticated ideas about sex or whatever?
I have the same concerns as you. DS is skipping 4th and will begin 5th next year having just turned 9 last month. Academically, I'm not really concerned about anything other than filling in the blanks for fundamental things missed in 4th. However, socially? Whew, that's a whole other issue - so many questions/concerns/what ifs and so on. I'm sure part of it is over-worrying about the 'unknown'. Even now, in 3rd there have been topics of discussion among classmates that are waaaay beyond what DS was ready for. Not that he doesn't logically get it, but he's not emotionally ready for some of these things, kwim?
Good luck to you.
