Understanding bar graphs
Superman has his Fortress of Solitude to ponder problems. Reed Richards has his thinking room to ponder the meaning of the universe. I suggest you too, develop a small thinking space in your day, during which you can ponder new ideas, and sharpen the mind. Case in point - two clips below.
Last year I was asked to make several clips that would support learners' statistical knowledge. I decided that the series should concentrate at the lower levels. This clip covers an activity that demonstrates how a bar graph works. The second clip takes this a bit further and shows how data can be better represented.
If you are an educator, I think that the two clips (while not perfect) might provide some good ideas. They are easy to do to, and produce lots of god learning.