Campus iPad Pilot Project - Top 10 iPad EDU Apps

We are just beginning a new iPad Pilot project on our campus.  I am the Chair of the Educational Technology Committee.

One of the things the I.T. folks want to know is what iPad Apps faculty think would be useful to enhance Professional productivity and Classroom effectiveness.

I have been an Android person, and owned several Android devices including a tablet (never an iPhone or iPod). 

So please help this Apple Novice learn about the "i" world.  What are the most valuable Educational related Apps on your iPad?

Thanks for sharing your insights. 

Greg