By operation
| Operation | Sets | First try | Retried | Time: first → latest |
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Open learning materials for growing minds
Math you can touch, try, and make your own.
Short, original activities for elementary learners—on paper, on a tablet, or with a school laptop. Accuracy and strategy come before speed.
- No sign-in
- No ads or tracking
- Progress stays on this device
8 × 756
36 ÷ 66
9 + 615
notice a pattern
try a strategy
check your thinking
Practice in the browser
One thought at a time
Ten questions make a set. Use the keyboard or the large on-screen controls. A hint helps you choose a strategy without giving away the answer.
Addition · facts to 20
1 of 10
Set complete
You stayed with the thinking.
The award is a personal celebration, not a graded or verified credential.
Stored only on this device
Learning progress
Facts to revisit
A fact appears here after a wrong numeric answer or a requested hint. Empty or mistyped entries are not counted.
Recent sessions
| Date | Learner | Set | First try | Retries | Confidence | Time |
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Downloads are created locally. Nothing is uploaded or sent to a school, teacher, or server.
Point, tap, or type
A small number grid
This child-sized 4×4 Sudoku uses only 1–4. Each row, column, and outlined 2×2 box needs every number once. Select a blank cell by click, touch, or keyboard, then enter a number.
Select a blank cell to begin.
Reviewed printable
A calm four-page practice pack
Addition, subtraction, multiplication, and whole-number division—each with a strategy prompt and a short reflection. Letter-sized and friendly to black-and-white printers.
- Answers are intentionally omitted from the learner pages
- Timing is optional and comparison is only with yourself
- A reproducible seed keeps every published pack auditable
Where this can grow
Arithmetic is one doorway
The studio is designed for many forms of elementary mathematics. New activities should remain visual, explainable, culturally adaptable, and genuinely original.
Patterns & puzzles
Notice structure, predict what comes next, and explain why a pattern works.
Shape & space
Build, fold, rotate, and reason with diagrams before reaching for formulas.
Stories & choices
Use estimation and number sense in questions with more than one good path.
Explain your thinking
Make room for drawings, words, symbols, and learner-created examples.
Open by design
Use it, translate it, improve it.
The code is MIT licensed and the original learning content is shared under CC BY 4.0. Contributions must be original or clearly licensed—never copied worksheets, scans, answer keys, or proprietary problem sequences.
Visit the repository