My dd is 9, 10 in August, and in Year 5.
Relationships seem to be moving on. Between the girls in dd's class they are more churned up. Lots are talking of boyfriends/girlfriends; one or two girls are being quite flirtatious (one has been flashing her knickers and boobs at the boys).
We have recently had the explicit sex talk (mum, exactly how does the sperm get to the egg?) so she now knows all, including periods etc though her own puberty is, I think/hope, some way off still. She was a little worried about puberty, but is happier now as I have said all her school friends will be experiencing it too, and that some may already be.
DD is thinking more seriously about her future too. She is more interested in which/what kind of school she wants to go to after primary.
She is concerned about her appearance and is more interested in fashion, though prefers to make her own style at the moment.
She is pushing for more independence, but is happy that we still limit the amount we give her.
She answers back and is much cheekier (ruder, really) than she has ever been, and we deal with that swiftly and sharply, but will make friends again very quickly. She needs time to cry about things in a safe place - usually well cuddled.
All of this is a continuation of a process which was noticeable last year but has stepped up a level this year.
Is that any help?