The availability and popularity of visualizations on the Net seems to be increasing. I think the value of these illustrations to education is underrated. For some students, at certain times, it’s the best way to get a point across. However, the current sources of educational media in higher education – Instructors/Faculty and textbook publishers – do not typically have this skill set.
Here’s one from the “Information is Beautiful” blog that gives a birds-eye view of the activity of Twitter users. Click here to see more visualizations.