Gabriella Sheh loves attending her after-school maths class on Sydney's north shore. The 10-year-old enjoys it for one reason in particular — the abacus. "I think it's probably heaps better than a ...

Know the top 5 free abacus learning apps for kids in 2025 to improve math skills through fun and interactive tools. These are best to build strong number sense, enhance concentration, and make ...

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 ...