J. Matt Switzer
The trichotomy property and order relation symbols show the Cartesian plane divided into three regions, as students connect tabular and graphical representations of functions.
Michael D. Hardy
Using scale models of cars generates a need for unit conversion within realistic contexts.
Robin S. O’Dell
Graphing orbits using linear iteration rules inspires enjoyment and artistry.
Marlena Herman and Jay Schiffman
The process of prime factor splicing to generate home primes raises opportunity for conjecture and exploration.
Kevin C. Moore and Kevin R. LaForest
A connected introduction of angle measure and the sine function entails quantitative reasoning.
Catherine Tabor
A programming activity helps students give meaning to the abstract concept of slope.