Free & open source

Math practice,
without the barriers.

A keyboard-only arithmetic worksheet built for students with motor impairments. Type a calculation, press Enter and solve it in a primary-school column layout.

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Built for one student at UAS Campus Vienna. Designed to work for anyone who learns best with a keyboard and a structured layout.
— Research Project Goal

Built for the keyboard.

Every interaction designed around one principle: never take your hands off the keys.

1
8
7
+
2
9
2
1
6

Grid-based interface

A 24×30 cell grid that formats your calculations as you type, addition, subtraction, multiplication and division, all in the primary-school column method.

Press Enter

Reformat equations automatically into a vertical layout.

Audio feedback

Bright tones confirm correct answers, soft tones flag rejected keys.

One button print & export

Print plain-text sessions and worksheets with a single button.

Undo anywhere

Ctrl + Z up to 50 steps back.

Auto-save

Your session restores automatically on reload.

Lightweight

Pure HTML, CSS and ES modules. No tracking.

Accessibility first

Auto-formatting and jumping cells, audio cues and a high-contrast color palette. Built for motor impairments, useful for anyone who benefits from structure.

Every key has a purpose.

No menus, no mouse, no hunting for buttons.

Move around
Esc
Cancel the current operation
+ × ÷
Start an operation
Tab
Jump to next unanswered result
Enter
Start calculation
Ctrl+Z
Undo the last keystroke
Backspace
Delete cell
AZ
Write text

Feel free to try it!

No account, no install, no tracking. Open the worksheet and start typing.

Open the worksheet