A Numberdale game · Ages 8 to 11 · Grades 3 to 5
Orb Spirits
A creature-collecting adventure where every move is real math. Build numbers, break shields, make friends. One Book per grade, 3 to 5.
No ads. Plays in any computer or tablet browser.
How it works
The math is the game.
Not a quiz in front of a game. Every move your child makes is a math move.
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Build the number.
Drag glowing orbs, crystals and gems into the tray. Ten orbs fuse into a crystal; hold a crystal to break it back into ten. Place value, right in their hands.
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Break the shield.
Every grumpy monster holds a shield: a number, a picture, a clock or a story problem. Match it exactly and it shatters. Too much bounces back.
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Make a friend.
Beaten monsters become friends with new powers: copying groups, doubling beams, splitting moons. 80+ spirits to collect, evolve and visit in the Spirit Grove.
What they learn
A whole school year in every Book.
Each Book follows the US Common Core State Standards for one grade, one adventure at a time. Every fight is generated with at least two ways to solve it, and each skill has its own difficulty that adapts as they play.
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Ready
Book 1 · Grade 3
The Light of Glowwood
- Place value to 1,000
- Adding and subtracting with regrouping
- Multiplication and division
- Fractions on a number line
- Time to the minute
- Area and perimeter
- Graphs, rounding and two-step problems
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Ready
Book 2 · Grade 4
The Lost Colors
- Numbers to a million
- Multi-digit adding and subtracting
- Multi-digit multiplication and the area model
- Division with remainders
- Factors and primes
- Fractions and decimals
- Angles
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Ready
Book 3 · Grade 5
The Sky Gears
- Decimals and powers of ten
- Adding, multiplying and dividing fractions
- Volume
- The coordinate plane
- Expressions and order of operations
For parents
Parent Corner
See what they practiced, where they get stuck and what to try at home, in English, Español or 中文. Progress stays on your device; a family account is optional and keeps it in the cloud for another device.
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No ads. Ever.
Not in the games, not on this page.
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No coins, loot boxes or upsells aimed at kids.
Anything a grown-up should decide sits behind a grown-ups check.
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No personal data from children.
Progress stays on your device. A family account is optional.
FAQ
Questions about Orb Spirits
Does my child need to read well?
No. Every line is spoken aloud, and the tutorial shows each step with a pointing hand.
Which Book should they start with?
The Book for their grade. A strong second grader enjoys Book 1; a child who finds Book 1 easy can switch Books any time from the book chooser.
What devices does it run on?
Any modern browser on a computer or tablet, in landscape. Apps for iPad and iPhone are coming.
Games
The other games
Finished, or not the right fit? The next stretch is waiting.
