I upgraded my iPhone4 and iPad2 to iOS 5 this week and discovered PhotoStream. When my iPad2 is connected to our art room TV, I can take photos using my iPhone4 and they project as a very large scale photo slideshow! Students don't have to wait to see themselves in action. It is instant!
Watch 4th grade artists working in class on Friday. Because of PhotoStream and iCloud, they already saw these photos during art class.