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123OnAbacus
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Every lesson, game and guide on 123OnAbacus — one list, zero dead ends.
Adventure
Home — abacus for kids
How it works
Learn — all 42 lessons
Practice skills
Games arcade
What is an abacus?
Games
Feed Nova — abacus game
Rocket Numbers — addition game
Balloon Pop — reading game
Treasure Cave — memory game
Abacus Race — number chains
Number Builder — place value game
Grown-ups
For parents
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All lessons
Bead Village — Meet the Abacus
Welcome, Number Explorer!
Parts of the Abacus
The Bead Family
Bead Gym: 1 to 4
Zero the Hero
The Abacus Time Machine
Village Festival
Number Garden — Numbers 0–99
Explorer Check
The Bead Worth Five
6, 7, 8, 9!
Number Builder: 0–9
Numbers Check
The Tens Rod
Reading Big Numbers
Two-Digit Builder
Sunny Sum Valley — Addition
Tens Check
Hundred Heroes
Big Number Builder
Big Numbers Check
Adding Is Pushing Up
Adding With Tens
Addition Gym
Misty Minus Mountain — Subtraction
Addition Check
Taking Beads Away
Subtraction Gym
Subtraction Check
The Tricky Takeaways
Borrowing Beads
Takeaway Trials
Secrets Check
Friendship Forest — Number pairs
When Beads Run Out
More Little Friends
Little Friend Sums
Little Friend Check
The Rod Next Door
Teams That Make Ten
Big Friend Sums
Big Friend Check
Imagination Grove — Mental math
Picture the Beads
Flash Cards
Lightning Lake — Speed & accuracy
Quick Fingers
Beat the Star
Mixed Sprint
Speed Quiz
Lightning Cup
Mastery Castle — Mastery
Arcade Day!
The Master Quiz