Quick: what’s 4 + 5? Nine right? Slightly less quick: what’s five plus four? Still nine, right? Okay, let’s wait a few seconds. Bear with me. Feel free to have a quick stretch. You’ve just performed a ...

We have all heard the old saying, "Sleep on it," when trying to solve a problem or making an important decision. There might be some scientific truth to that advice, especially when it comes to ...

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 ...