Dunno about that one - my second D's played with grade 2 people all the time. The teacher I spoke to about it said just make sure there is at least one other kid on your child's year playing ok. So your child, another preppie and then the older girl(s). That's just what the teacher at our school recommended, perhaps tour daughters teachers might be able to guide you a bit more? It's good to have an older buddy, as long a she has some playmates closer in age too I think.