ClassTag is a free service for communicating with parents about what's going on in your classroom. ClassTag lets you send email, push, and SMS/text announcements to parents from one streamlined dashboard on your computer. ClassTag also provides teachers with free tools for scheduling conferences, events, and for coordinating parent volunteers. You can take a tour of the service in my video here.
Recently, ClassTag added two new features to its free service. First, there's a new feature called Child Stories. In Child Story you can post updates about individual students that only their parents can see. Second, videos that you post now appear inline as opposed to as attached files. Inline display is much like what you see in Facebook or Twitter.