Next time you do a snapshot writing session with your students where you simply show your students a catchy picture and get them to explain how they might feel at that exact second explaining what they can see, hear and feel be sure to run your image through it through jigsawplanet.com
Jigsaw planet turns any Jpeg image into an interactive jigsaw that you can move around on the screen. It has a ghost overlay if needed to help speed up the process and really helps students study the different aspects that make up an image in parts instead of the whole.
Give it a look. I also highly recommend it for junior students also.