I really like how iSupport broke down the 5 classroom projects using outcomes, context, and Blooms levels illustrating the potential learning taking place creating a movie, PDF, presentation and an interactive book on the iPad.
Great example of how students took it upon themselves to create visual notes illustrating the process of how an artificial tree is made. The post also provides an insightful TED Talk on the subject of sketchnotes and why "Doodling" is a positive thing.