I have had a FB account since 2008.
I am a member of over a dozen groups.
My groups include my church, a couple's Bible study group, alumni groups, health and fitness support group, leadership strategy and ministry groups and and others. I created a group called Risen Women which I administrate as a connectuon group for the ladies in my church community.
I found this group recommendation from a member of this course.
http://www.elementaryarts.com. It has some great ideas posted. I really never thought about FB groups for classroom resources, other than I have several teachers as friends on FB who post classroom ideas.