Math without the handwriting struggle
A structured, keyboard-first math workspace built for students with dysgraphia and other learning differences. Show your work, your way.
Built for showing your work
Every feature is designed to make math accessible — without sacrificing the steps that teachers need to see.
Structured Math Blocks
Drop blocks onto a grid-based canvas for addition, subtraction, multiplication, and long division — laid out just like paper.
One Digit Per Cell
Each cell holds a single digit, keeping columns aligned automatically. No more cramped or misaligned numbers.
Keyboard-First
Type digits and navigate with arrow keys. No mouse required — fast, accessible, and frustration-free.
Cross-Out & Carry
Toggle cross-out lines for borrowing and add carry digits above — all the regrouping steps, shown clearly.
Copy as SVG
Copy individual blocks or the entire workspace as crisp SVG images. Paste into docs, slides, or assignments.
Annotation Tools
Add text labels, arrows, and shapes to explain your reasoning. Show your thinking, not just the answer.
How it works
Getting started takes seconds — no accounts, no installs, no learning curve.
Choose a block
Pick a math block type — addition, subtraction, multiplication, or long division — from the toolbar.
Place and solve
Drop the block on the canvas and type your digits. Cells auto-advance left to right, keeping everything aligned.
Show your work
Use carry rows, cross-outs, and annotations to show every step of your reasoning, just like on paper.
Export and share
Copy your work as SVG, download it, or share it with your teacher. Clean, readable, every time.
Who it's for
penblox is for anyone who believes math ability shouldn't be measured by handwriting.
Students with dysgraphia
Replace the handwriting struggle with a clean, structured workspace. Focus on math, not on forming letters and numbers.
Students with learning differences
Built with dyslexia, dyscalculia, and dyspraxia in mind. Clear layouts, large targets, and keyboard-first input reduce friction.
Parents
Give your child a tool that builds confidence instead of frustration. Watch them show their work independently for the first time.
Teachers
Students export clean, readable work that shows every step. No more deciphering handwriting — just math.