Thanks, no5no5, for that recommended reading. However, I'm not sure if she's open to any reading recommendations from me at this point! smile But I'll definitely bookmark that for when I feel confident she would be receptive.

I agree with DS's teacher that his use of a baby voice can be very annoying (and is annoying to us too and we've been working on him to stop using it). But I can't imagine that being a rationale to not accelerate him on a few subjects...