Vinaya Kulkarni said she believes she has the program that will help grade-school age children gain confidence and competence in arithmetic. Kulkarni is the founder and head teacher of Abacus West, ...

Over 350 children from 30 African countries gathered in Kigali on Saturday, October 18, for the 2nd Shenmo Africa Cup Abacus Mental Math Olympiad, a fast-paced, high-energy arithmetic competition.

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 ...