G+ Communities
Google+ Communities is a perfect way to create an online classroom community, or extend your own Personal Learning Network where you can share and learn from millions of educators around the world. Search the G+ Communities for communities that might support your specific needs. G+ Communities allows you to create either private or public communities where participants can share ideas, links, videos, photos, or events.
My Private class G+ Community:
note: this is a private community you will not be able to access it unless you are invited
More Links:
Some Google Apps Communities for educators: