Instagram for a class

I set up an Instagram account just for my classes, "NV_TAG" and made it private, so I can share things about our students to just their parents who are approved by me.

Some people/groups I've followed on my personal account are TED, National Geographic and Iowa History.

My problem with using it in my classroom very much is we have students you are not allowed to have their picture taken.  Even if I only share to parents in my classroom it would be simple to screenshot and share with anyone.