http://www.blockposters.com/ This website will take your image, picture, etc and blow it up and send it to your computer so that you can print it yourself. It breaks down the image and puts in on standard paper and will make it any size you want. Best of all - its free! Don't be put off by the sample poster. I have used it and it is great! Imagine making a bulletin board with a giant picture of your class. Cover your door with a life sized picture of yourself holding a sign that says "Welcome to Xth Grade!" That would give those kids something to talk about!