Think about the so-called "story problems" you studied in algebra and other math classes. How many of them dealt with, say, two trains which, no matter how far they traveled, could never catch your ...

Introducing new math concepts via already-worked examples can give students a significant boost in learning. But choosing the right problems makes a big difference. An analysis earlier this year of ...

Everyone agreed on the first step: Solve inside the parentheses, for 2+2=4. But after that, people split down two paths. Some multiplied first, while others divided, leading to different answers—1 and ...