BoomWriter is a free collection of three excellent writing resources for students and teachers.
StoryWriter let's students write a book collaboratively. It is easy to use, has some great features, and a very useful teacher dashboard. This is a great way to get students engaged in writing.
ProjectWriter is a new product and lets students work in groups on non-fiction writing such as science projects and lab reports, research papers and more.
WordWriter helps students learn and improve their vocabulary, which is essential to writing.
All three are easy to use, have lesson ideas available and help get students interested in writing and improve their writing.