- Part 1: x+y=S, xy=P
- Constant Sums
- Constant Products
- Analyzing Graphs (a connection is made to factoring trinomials)
- Edited version of the above three lessons
- Four Representations
- GeoGebra Applet (and file) by Henri Picciotto
- Cabri figure by Henri Picciotto
- Cabri figure by Ari Klein
- Part 2: ax+by=c
- Standard Form for linear functions
- Part 3: Geometric Connection / Optimization
- Constant Perimeter
- Advanced Penmanship
- Edited version of the above two lessons
- Constant Area