our dd 4 was in a preschool setting and didn't play much with the other kids; I had been asking to have her moved up to their k class in case that helped and b/c there was some more structured academics there which I think she'd really enjoy.

After a few weeks observation and discussion, they did do a trial and it really clicked for her, suddenly she had several friends and the teacher found her a delight and it was a great experience for her.