A new area for Mathematica beginning with version 6 is the development of an online repository of Mathematica Demonstrations. There are currently almost 1700 demonstrations accessible at Wolfram's Demonstration website in a wide range of topic areas. The online demonstrations can be used immediately, or the source code can be downloaded and mined to discover ways to create your own demonstrations.

I have a few demonstrations available at the Demonstrations website already. Go to the site and enter schulz in the search field. I'd be more than happy to answer any questions you may have about these demonstrations. There are more demonstrations in development that I'll be creating and submitting for online publication. If you have an idea and need some technical assistance to bring your idea to fruition ... I'm always willing to help.