I'm testing data visualization software (and ideas) for a faculty member working on a project about real estate values and public school systems. I have a couple of examples I made of visualizations of Connecticut housing data using Tableau Public here and here. Of course, with Tableau Public, you have to worry about the stability of the cloud, so for this particular project, I'm not sure whether this will do.
But I'm a big fan of Jon Udell (and Hans Rosling) and so I would make the argument that creating screencasts in which the author of data visualization narrates the data are going to be useful for those who would rather sit back and listen. These days, the free tools with which you can make screencasts are endless, but I prefer Screencast-o-matic. The interface looks clunky, but works like a dream. (Read this review of 12 screencasting tools if you want to try something else). With Screencast-o-matic, you can export your screencast as an mp4 (like here), allowing you to preserve whatever (possibly) unstable data visualizations you have created while simultaneously supplementing the visualization with a soundtrack.
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