Parentella is a platform designed for the purpose of facilitating online communication between teachers and parents. Teachers can register for a free account, create a classroom, and begin posting notices for parents to read. Parents can use Parentella to keep current on news from school and to communicate with other parents.

Applications for Education
Parentella is a good option for creating an online communication hub between teachers and parents.

Here are some related resources that may be of interest to you:
My Brochure Maker – Create a Mailer
Build Your Own Browser Toolbar
Tatango – Free Group Text and Voice Messaging