Michael D. Hardy
Article recounts sixth graders' investigations of combinations and graph theory that arose from a claim made on a Steak 'n Shake menu. Several problems for use in class are provided.
Robert M. Norton
Three dice games pose fairness issues that appeal to students. The games are examined in a way that leads directly to the theoretical probabilities for all possible outcomes.
Arlene Yolles
Prime numbers and their connections to related topics.
Joseph G. R. Martinez
A three-step process – exploring, inventing, discovering – that helps students derive concepts actively from problem solving.