Interpreting Bar Graphs

Interpreting bar graphs seems like a simple concept. But if we go deeper it can be very complex.As I was reading my current issue of NCTM's Teaching Children Mathematics magazine last night I came across a graph that at first glance seems so simple. Then I took a second look.

Having students determine the number of pockets that day could be a challenging task and lead to a great discussion. You could also have students talk about what each column means. Can they compare the columns using math vocabulary correctly. What questions could your students write that would ask children to interpret the graph in other ways?