Google+ safety center provides a wide range of resources to teachers, parents and teens to help them learn more about how to use Google+ in a fun, smart and safe way. It has a lot of materials that we can use with our students in the classroom to sensitize them about the online privacy issues. I do recommend these tools to educators.
There are three guides provided by Google+ safety centre :
This guide provides tips to teenagers on how to use Google+ and navigate the social web safely
This one here is to help parents teach their kids how to stay on the righ side of the line while online
This is for teachers to show their students how to operate safely and responsibly in their social expereinces online