I created this interactive tutorial on the economics of permanently affordable housing after trying to explain these concepts to small groups with static PowerPoint slides. The key to understanding the growing homeownership affordability challenge is the relative rates of change of housing prices and incomes. I found that this idea was difficult to explain verbally but was easy for people to understand with the help of simple drawings. To create the tutorial, I had to not only create the images and write the accompanying text but build a complex user interface to allow people to control the flow of the presentation and skip forward and backwards.
The presentation has proven extremely popular and has been shown by myself and a number of other advocates to thousands of people at a series of housing and urban development conferences. The latest version includes an imbedded voice narration. The presentation can also be run without the audio with either full text narration on screen or with bulleted text for live presentations to groups.