Invite students to contribute to a group project or blog — new users can create an account in seconds and join in. Reminder: Students need to be at least 13 or older to register for a WordPress.com account, without permission from a parent.
Publish class news to your blog, or embed a Google Calendar with upcoming events to keep parents in the loop.
Need to limit access to your site? No problem. Add a password to any page, or make the entire site private and invite only the people you choose to view it.
Via Gust MEES
A MUST check!!!