Abaci One
Screen time that builds real math skills
Your child can learn to calculate in their head
The abacus is the world's most proven tool for building mental math. Kids who learn it don't just memorize facts — they build a mental picture of how numbers work. And they can practice right here.
Learn why it works →The abacus teaches kids to see numbers
Children who learn the abacus don't just memorize math facts — they build a mental picture of how numbers work. That's why abacus students develop faster mental arithmetic than any other method.
What You'll Learn
Practice that meets your child where they are
Not too easy. Not too hard. Every session adapts.
Tracks real mastery
Every answer updates a skill model of your child's abilities. Practice sessions target what they're ready to learn next — not what a grade level says they should know.
Games that teach in disguise
Between drills, kids earn solo game rounds — but every game is still teaching. Match abacus images to numbers, answer complements to drive a train, race through mental math. They're always learning, whether they know it or not.
Works for multiple kids
Set up profiles for each child with independent progress tracking. Each gets their own adaptive path.
The Arcade
Math games worth earning. Solo challenges and multiplayer battles that kids actually want to play.
Matching Pairs Battle
Multiplayer memory battle with friends
1-4 players
Music Note Match
Match notes on the staff with their names
1-4 players
Know Your World
Test your geography knowledge by finding countries and states on the map!
1-8 players
Memory Lightning
Memorize soroban numbers and recall them
1-8 players
Type Racer Jr.
Type words letter by letter to earn stars
Solo challenge
Mathematical playgrounds
Not everything has to be a drill. Explore geometry, number lines, and more — tools for curiosity, not just correctness.
Euclid's Elements
Compass-and-straightedge geometry, proposition by proposition
Constant Demos
Watch pi roll, e branch, and the golden ratio spiral — 10 animated explorations
Talk to a Number
Dial any number on the line and have a voice conversation about its properties
Coordinate Plane
Word problems on a magnitude-aware 2D grid
Dice Tray
3D physics dice. Add them up.
Printable practice materials
Generate worksheets, flashcards, and calendars — better than what you can buy. Customize everything. Download as PDF.
Built by a parent, for their kids. Not a startup. Not ad-supported. Just better math practice.
Try it now — no account needed
Create a student profile and start your first practice session. Everything works without signing up.
Get started→Soroban teacher? See what we built for you →