Allan Carrington of the University of Adelaide explains how he built upon the work of others, who had built upon Bloom's taxonomy, to get The Pedagogy Wheel with iPad Apps.
Here is Allan's blog, which is a wealth of information. And, here's his youtube video explaining the iPad App-enhanced Pedagogy Wheel.
I can't wait to explore this a bit more. Since I don't own an iPad (although "I'm a MAC") and since many/most of my students don't have iPads, I'd like to explore what shareware and free websites might be added to each area, for I do believe the simplicity of this wheel is a powerful tool!