Great approach to helping instructors understand some basic issues of student privacy and the role of social media. This kind of argument might encourage people to assign the use of (and contribution to) open educational resources. "FERPA was never intended to place students into the box of a physical or online classroom to prevent them from learning from the public."
Links to free course collections (e.g., Annenberg Media) in the following disciplines: English, Mathematics, Science, Social Studies, Health Education, Physical Education, Computers
TodaysMeet - a free online tool to allow for real time online conversations in a closed room with no ads - even good for primary grades. This review also shows examples with pix