Somewhat unrelated: I really enjoyed this recent NYT article about how schoolkids in Japan master arithmetic by learning how to use an abacus: https://www.nytim

Somewhat unrelated: I really enjoyed this recent NYT article about how schoolkids in Japan master arithmetic by learning how to use an abacus: https://www.nytimes.com/2019/08/21/world/asia/japan-abacus.html https://www.nytimes.com/2019/08/21/world/asia/japan-abacus.h...