Looks like I can only include one attachment per blog post, so I was only able to put the presentation in my previous blog entry.

Here's the sample code from yesterday...Demo1 is the completed number-to-word conversion class...CurrencyConverter1 is the "god" class implementation of the foreign exchange demo while CurrencyConverter2 is the implementation which makes use of the dependency injection pattern ("inversion of control") and a mock object to illustrate object interaction testing.