There are gadgets that make using your iPhone for creating media even easier. The iPevo 2 enables you to share your phone screen using your computer and a projector. They offer educational pricing. http://www.ipevo.com/prods/Point-2-View-USB-Camera/IPEVO
I also had a Joby Gorrilla tri-pod that was useful for the few minutes that I was able to play with it before the dog ate it. I am looking to replace it soon. http://www.amazon.com/gp/product/B004AP9638 (My other one only cost me $18!)
I also have a clip on microphone so I can video tape people speaking easier. I got mine from Amazon on sale. http://www.amazon.com/gp/product/B002HJ9PTO
At Target I saw little stylus pens made for iPhone and iPad screens. May help with some of the editing and effect work on photos. They were made by Griffin. I may get one to use for GreenScreen Studio. They were about $18.