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's a quick way to 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
For more in-depth information on how to set up the notebook app, please see the article:
How to set up Notebook App and send staff logins?
