Material Detail

A free, browser-based interactive abacus for teaching and practicing mental arithmetic. Supports both Soroban (Japanese, 1 top bead + 4 bottom beads) and Suanpan (Chinese, 2 top beads + 5 bottom beads) configurations. Includes a built-in tutorial, randomized practice challenges with progress tracking, complement drills, timed challenges, and flash number recall exercises for building mental abacus (anzan) skill. Useful for whole-class instruction or independent practice, suitable from elementary through adult learners. No signup required.

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