Exploring the use of iPads and mobile devices in education.
Simple press the On/Off button (top of your iPad) and the Home button (large button on the front) at the same time. You'll hear a click and the screen will be saved directly into your iPads' photos library.
One great application for this feature is saving pages and images from the web for class use and distribution. Once saved, you can open the Photos app and print or email the image.