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 ...

OUR mathematical readers who do not read German will be glad to know that they have now before them a translation of a discussion of three famous geometric problems of antiquity, namely, the ...

Experts agree: Elementary teachers need to have a strong foundation in math. But teacher-preparation programs don’t always dedicate much time to elementary math coursework. That’s starting to change, ...

Teachers can use these tools to promote discussions and help students move from concrete to abstract understanding of concepts.

The designers for Monte Vista Elementary School’s proposed outdoor classroom had some key questions to answer: What materials could they use while staying under the district’s $10,000 budget? How much ...