I was wondering if you happen to have any actual picture of the graphing pictures that you have listed on your website. I would like to do this with my class as well, but I would like to have a look at the pictures as the school is a little funny about things. :-( If possible please e-mail me back and let me know if you do. Even if they are samples of your students' work. What school system are you in? What state are you located?