A set of guidelines adopted by 45 states this year may turn children into "little mathematicians" who don't know how to do actual math. A few weeks ago, I wrote an article for TheAtlantic.com ...

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 ...

Multiply by 5 using the grouping of objects, counting by fives, and arrays. Explore the Multiply by 5 facts using the grouping of objects, counting by fives, and arrays. Compete against characters to ...

Once Sanaa Hiremath, 11, was home schooled, she found she could do math without writing problems down. She has a Guinness World Record, finishing a 12-digit multiplication problem in under 10 minutes.

On a breezy July morning in South Seattle, a dozen elementary-aged students ran math relays behind an elementary school. One by one, they raced to a table, where they scribbled answers to ...