Forbes contributors publish independent expert analyses and insights. Linda Darling-Hammond is an expert on education research and policy. PISA scores reveal deep problems in how the United States ...

We like to think that we're pretty good at math, especially after years of schooling. But every once in a while, a simple third-grade math problem manages to trip us up and make us question our ...

A new proof about prime numbers illuminates the subtle relationship between addition and multiplication — and raises hopes for progress on the famous abc conjecture. One morning last November, the ...