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 ...

Students in some local elementary schools are learning a completely different way of doing multiplication. It’s a technique that many parents can’t understand. It’s called lattice multiplication. The ...

Chinese Zhusuan is a time-honoured traditional method of performing mathematical calculations with an abacus. By moving beads along rods, practitioners can perform addition, subtraction, ...