- Divisibility Rule for 7 (VIDEO!)
- Why All Quadratic Graphs are U-Shaped (VIDEO!)
- Intersection Math Puzzle (VIDEO and ESSAY!)
- i is not the square root of negative one! (VIDEO!)
- The Danger of Square Roots (VIDEO!)
- LOGARITHMS: More Mathematics about them (VIDEO!)
- Logarithms: Brief History and Brief Math (VIDEO!)
- Synthetic Division: How to understand it by NOT doing it! (VIDEO!)
- A Cute Finger (and toe!) Multiplication Trick (VIDEO!)
- The Natural Way to the Equation of a Line (VIDEO!)