You should be able to designate the privileges of each group member (ex: These 3 can view and edit, these 2 can only view)

I am the inclusion teacher for my grade and I would like the rest of my team to be able to edit the plans, but I would prefer my special ed small group teachers only be able to view our plans. In addition, it would also be helpful for admin - you could add them to view, but not to edit.