it's also about sharing with the right people. Circles will allow what educational consultant Tom Barnett calls "targeted sharing," something that will be great for specific classes and topics
Skype has become an incredibly popular tool to bring in guests to a classroom via video chat -
teachers are already talking about the possibility of not just face-to-face video conversation but the potential for integration of whiteboards, screen-sharing, Google Docs, and other collaborative tools
Google + seems like the solution for someone like me who wants to use the web to have conversations about school topics with students and parents and yet not have students and parents have access to my personal posts.