More to explore:
Graph & Diagram RoundUP: 125 Ideas from REAL Classrooms at RainbowsWithinReach
data wall idea
Create-A-Graph. A very kid friendly program to get your students graphing in class. (blog post contains student friendly directions as well)
fantastic idea for the 100th day of school
Inference Anchor Chart
Students chart their own math benchmark test data with post-its. This took most 5th graders in the class 20 minutes! Data you can USE to drive your instruction!
I'm concerned that kids can see each other's failing scores, especially since the labels are red-yellow-green, which have clear connotations.
Free Data Handling Classroom Display Posters
There is a wealth of classroom decorating, organizing, and management ideas in this one blog post alone.