I recently was tutoring a high school student who was instructed in their data-management course to create several graphs from the same set of data, comparing rainfall in different Canadian cities.
Unfortunately this data didn't make any sense to be plotted as a line-graph, a bar-graph, a histogram and a pie chart, as the comparisons didn't make sense for any but the bar-graph. It was if the students were actively being taught how to use graphs incorrectly. Creating pie charts when the entire pie doesn't mean the whole of anything I think was the worst culprit.
Unfortunately this data didn't make any sense to be plotted as a line-graph, a bar-graph, a histogram and a pie chart, as the comparisons didn't make sense for any but the bar-graph. It was if the students were actively being taught how to use graphs incorrectly. Creating pie charts when the entire pie doesn't mean the whole of anything I think was the worst culprit.