Free
No account, no limit.
- official papers with answer key and scoring
- type an answer, the platform checks it
- a level test: twenty questions
A maths platform for exam preparation
An exam paper that solves itself. Step by step, on the board.
A student opens an official exam paper in the browser, no account needed. They type an answer and the platform checks it. If they do not know how to start, the solution writes itself on a green chalkboard one step at a time, with a voice-over and the typical mistakes from the marking scheme.
- Scope
- Polish matura (basic and extended), grade 8 exam
- Free
- official papers with answer key and scoring, no account
- Voice-over
- every solution step recorded separately
- Role
- author, developer, tutor
Why
At ten in the evening a student needs the solution, not a price list.
I tutor maths. The most common question from students is not about a hard problem but about how to start. The official answer key gives the result, not the reason. YouTube videos run for twenty minutes when the student needs one step.
- just the result from the key
- a twenty-minute video
- a price list instead of a solution
So a paper on Algebra i Spółka solves itself gradually. The student uncovers as much as they need. Under each step there is an “I don’t get this step” button that explains exactly that step, not the whole problem again. An uncovered step earns no point, so the final score stays honest.
Papers that already solve themselves
- 49
- official papers solved step by step
- 14 + 29
- basic and extended matura papers (since 2015)
- 1031
- tasks in the papers, each scored automatically
- 190
- voice-over clips in a single paper (May 2026, 45 minutes of speech)
Solution films
Animated exam papers with voice-over
Every task in a paper is a film of its own: the solution is written in chalk and a voice reads it step by step (in Polish). Below are three tasks from the May 2026 basic matura. On the site the same animations are interactive, so the student can stop at any step and type the answer themselves.
Task 1. Powers and roots Task 9. A rational equation and its domain Task 12. Reading a function from its graph
How a paper is made
Every solution checked twice before a student sees it
I read the task and the marking scheme from the official PDF. I write the solution step by step and compute every result a second time in an independent system (sympy and Wolfram). Geometry figures are generated from code, with coordinates calculated rather than placed by eye.
The voice-over is speech synthesis recorded separately for each step and stored in R2, so the page plays only the piece the student is looking at. Quality gates stop a paper with a missing check, an empty step or an animation that does not start.
- A paper lives in six places at once, so the list of papers is in the repository and a guard on production checks every five minutes that none has disappeared.
- One function scores answers in the paper, the task bank, the quiz and the games, so “0.5” and “1/2” mean the same everywhere.
What else is there
More than papers
Games
Six modes on the same tasks: practice, quiz, time sprint, true or false, a quiz-show and matching.
Level test
Twenty questions and a report on where to start. Free.
Worksheets
Printable task sets matched to topic and level.
AI tutor
Answers a question about a specific step instead of doing the whole task for the student.
Lesson room
Video and a shared whiteboard in one browser tab. It grew into a separate lesson whiteboard.
Payments
Premium accounts and lesson packages paid through HotPay.
Every paper in one place
Basic and extended matura papers since 2015, plus the grade 8 exam. Every paper opens without an account.
Why free
Part of it stays open, on purpose
Official papers with the answer key and scoring are available with no account and no limit. The more young people practise logical thinking, the better for everyone, me included. What costs money is what takes my time or computing power: the full task bank, an exam simulator with a report, and lessons.
Paid
What takes my time or computing power.
- the full task bank
- an exam simulator with a report
- lessons with a tutor
Stack
What it runs on
- React
- TypeScript
- Vite
- Python
- Flask
- PostgreSQL
- Cloudflare Pages
- Cloudflare Workers
- R2
- KaTeX
- sympy
- WebRTC
- HotPay
Teaching maths, or building something for learners?
Tell me what you are looking for. I will tell you what already works on the platform and what is still being built.
Or write straight to my inbox:
a.grudzinski1992@gmail.com- Reply time
- usually the same day
- Billing
- contract per task, invoiced through Useme
- Where
- Szczecin, Poland. Remote, on site near the German border
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- Online lesson whiteboardTablicaA shared whiteboard for online maths lessons. The student joins from a link, no account, nothing to install.
