Doris Young has a great blog and posted an activity that encourages students to think about the purpose for graphing. So, if you are graphing with your students and teaching them that graphs are used to track information, I encourage you to take a look at Doris’ post. She got her students to think deeper about graphing and then to analyze their graphs. The students wrote their mathematical thinking in a thought bubble above a picture of themselves. Doris posted the graphs, the pictures, and the thought bubbles on the bulletin board for the class to see and discuss.