Hi Nicole
We have private Facebook groups for various subjects/co-curricular activities that members of our community can join if they are interested in regular content. Such as ‘School Basketball’, ‘School Music’ etc, we have also made them for school camps and tours. The groups are managed by staff members in charge of that particular sport/subject. It works well for us and means we can focus our attention and strategy on the outward facing public social media channels.
Good luck!