Learn Abacus at Home: Learning the abacus is an important step in a child’s development. It is a fantastic way to improve mental math skills, concentration, and overall cognitive abilities. In this ...

When I was a kid learning arithmetic the only visual aid I remember is flash cards. These were useful for memorizing single-digit addition and multiplication, but is memorization really the best ...

FORT LEE — For 10 seconds, a series of 50 random three-digit numbers flashed on the screen. After another second, abacus master Jeonghee Lee announced she'd finished the mental addition, correctly ...