Here is some material from my former website at Northeastern Illinois University that might be of interest to Mathematics Teachers. Most of the rest of the original material can be found in the barryhdayton.space website.

- Some Pages of Interest
- Two Mathematics (HTML) This web document tries to explain the difference between Mathematics as taught in schools and Mathematics as used in applications. It is an expansion with links of my introduction to Chapter 2 of my Plane Curve Theory Book.
- Decimals (Slide Show)
- Combinations (.pdf)
- Chi Square Distribution (.pdf)
- Consumer Lending (.pdf)
- Pythagorean Triples Worksheet
- Traditional Soccer Ball (.pdf) Classsroom Version
- Soccer Balls -Full nontechnical Version (.pdf, 2024)

- Interactive Lessons. These are no longer fully interactive.
- Some unrealated websites archived by me.