Over the years, the material I present has changed, matured, and expanded. Trying to put together a comprehensive catalog that is not out of date as soon as it is completed has been a challenge.

Clicking on the image to the left will take you to a virtual catalog. Feel free to browse. If something strikes your fancy, I hope you can join me the next time I am presenting that topic. If would like to bring me to your school or other organization for the one of choosing, click here and we can begin a discussion.