Terry Goodman
A probability exploration built on shooting basketball free throws leads unexpectedly to the golden ratio.
Beatriz D'Ambrosio, Signe Kastberg, João Ricardo dos Santos
Generalizing from number patterns provides insights into the proof process and a basis for a hypothetical teaching trajectory.
Susan A. Peters
Statistics uses scientific tools but also requires the art of flexible and creative reasoning.
Sandra Argüelles Daire
Pi Day and Pi Week festivities-a good place to start-can be a springboard to mathematics celebrations throughout the year.
Samuel Otten, Beth Herbel-Eisenmann, Lorraine Males
A vignette from an early algebra class reveals a rich opportunity for generating proof before geometry.