Disclosure: Storyboard That is a long-running advertiser on Free Technology for Teachers. 

A few years ago I put together a PDF of five projects that your students can complete with Storyboard That. The projects outlined include creative storytelling, retelling of history, using comics in videos, crafting book reviews with comics, and creating multimedia ebooks. While the document focuses on using Storyboard That (they sponsored it) the concepts can be applied to many other other digital storytelling tool. The PDF is embedded below.