In a previous post I showed an animated age structure diagram depicting output from a simple population model written in Excel.  Here is another version of that model written in R.  One of the things I like about the R version is that I can post the animated .gif files directly into presentations without having to link to a video hosting site.

In class, I use the changed fertility and death rates to demonstrate the impacts on a population.

Interestingly, I found a link on the FlowingData blog implements a similar idea.