All the materials here have been collected over the years of my teaching career from a variety of sources. I have formed some of it into the structure of the Edge Textbooks. Much of the material is not original, however identifying the original source of it is not possible. Some of the material is adapted from that provided by the Edge. Other materials come from a wide variety of resources including the internet, printed publications and workshop/conference presentation. The information in this Wiki is intended for the instruction of my students.