Welcome to The Riddler. Every week, I offer up problems related to the things we hold dear around here: math, logic and probability. There are two types: Riddler Express for those of you who want ...

There are books at every grade level that can engage students in thinking about math. Go on a shape hunt around the house or in your community. What shapes can your child find? Look for circles, ...

Don't ever let someone tell you Yahtzee is an innocent, casual game. Yahtzee is simple, yes—mostly luck, with a dash of skill and math in how you score your rolls—but it is also brutal. Almost every ...