I came across this chart on the Interweb recently (copied exactly as shown on a school website):
It’s not clear what story this chart is attempting to tell, but I think it’s safe to assume that the purpose of the visualisation is to demonstrate those form groups with the lowest attendance and to allow some form of comparison across a year group and across the whole school. I think the chart fails in a number of ways.
The chart starts at 70% – this magnifies the visual perception of the difference between any two forms — the chart is stretched vertically and this distorts our visual…
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