abacus-based mental math instruction

Mathematician, Jr. helps children ages 4-10 develop strong mental math skills through abacus-based learning. The company offers on-demand, virtual, and in-person abacus classes, plus its own Jr.Counter tool inspired by the Soroban Abacus, along with workbooks, flashcards, and starter kits. It was founded by a homeschooling parent who created a progressive curriculum around the Jr.Counter.

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hands-on learningprogressive curriculum development