In Erin Bryan’s 5th grade math classroom, TGIF takes on a whole new meaning. Fridays don’t just herald the coming weekend. They’re also game days. “They all come in here on Fridays pumped,” said Bryan ...

For children who find math difficult or frustrating, or who just like to be challenged, there are many cool math games online to play for free. But are they useful? Research shows that the brain’s ...