Storybird is an online social platform (and Chrome app) for storytelling. Students act as authors, pairing their words with site-curated, licensed art.
Writing Exercises Children’s Section offers various prompt tools that can be used for creative writing exercises.
Scrible is a web-based (Chrome browser extension and website) bookmarking, annotation, and research-paper-creation tool.
What we need is an easy way for students to work independently when writing, but collaboratively when giving feedback. We need a tool that lets them work "collabordependently."