A key part—though surely not the only part—of early-grades math is ensuring students get the basic arithmetic functions down and, beyond that, making sure they’re able to swiftly and automatically ...

Everyone knows that arithmetic is true: 2 + 2 = 4. But surprisingly, we don’t know why it’s true. By stepping outside the box of our usual way of thinking about numbers, my colleagues and I have ...

When my children were in grade school, I never let them do their math homework with calculators. They had to work out the numbers in their head or with pencil and paper. I kept thinking about my ...

The disruptions to children’s schooling over the past two years have caused millions of American parents to come to an unexpected revelation: They are not as good at math as they had hoped. Nothing ...