The abacus itself, a simple wooden frame with beads, has been around for centuries as a calculation tool. Over time, it has ...

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 ...

Learning to use an abacus qualifies as a Big Pointless Goal, something that Gloria Liu describes in her recent article in the Atlantic as “an aspiration that lacks grand purpose, yet requires ...