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December 2010, Volume 104, Issue 5


Looking to Mars for Mathematics Connections
Arnold E. Perham and Faustine L. Perham
Kepler’s laws and beyond: Students use Jet Propulsion Laboratory data to investigate Mars and its orbit.

Pathological Examples with Technology
Marshall Lassak
Teaching moments occur when the use of calculators leads to unexpected but mathematically explainable results.

Cell Phones and Sun Shadows: Exploring the Equation of Time
Sean P. Madden
Students use cell phones and graphing calculators to model the differences between solar and clock time.

A Close Encounter with Infinity: Inventing New Mathematics
Keith A. Nabb
A nonroutine problem helps change how calculus students perceive and create mathematics.