You will be able to post photos videos, post daily dairies and chat with parents only if you log in to the Notebook via the 'I'm Staff' login. 
In case you haven't done it, here is how you can set up access for Notebook:
1. Head to Centre Settings>> Member Access Control. Create a member profile with App access
2. Go to 'Room/Class' and give relevant room access to the newly created member
3.Trigger a welcome email from Member Access Control, which will contain the logins to access the Notebook app
4. Use the logins received to login to the Notebook App> I'm staff option to post daily dairies/photo videos/access messenger etc
