Free during the beta · no bank card
The student writes their reasoning line by line, as on paper. Coach corrects it step by step: what is right, where it stops, and how to redo what is missing. Maths, 6e to Terminale, following the Ministry of Education’s official programmes, published in the Bulletin officiel.
In triangle , right-angled at , and . Find the length of the hypotenuse .
Feedback
Error analysis: You found , then concluded that is 100 cm. The last step is missing: taking the square root.
Suggestions for improvement: When you work with a square, always finish with the root: . Also check that the hypotenuse is still the longest side.
Solution
Every notion follows the same four stages. The next one opens when the previous one is passed.
A lesson that starts from their interests, read with the Companion beside it for questions and “Explain this” to rephrase a passage.
A series of exercises where the student writes their working line by line, with the Companion for a question during the exercise. At correction time, Coach reads every step: what is right, the step where it stops, and the detailed solution.
A timed, full-screen exam, with no help and no Companion: the student restitutes the notion on their own.
A challenge that chains questions on a complete situation, to check that the notion holds in a whole problem.
The Assimilation stage, to do yourself: five 3e exercises, one of each type, in Coach’s interface. You write your answers; the correction happens in Coach, with a free account.
You can write your answers here to discover the interface. The correction happens in Coach, with a free account: what you write here stays in your browser and is not transferred.
Answers typed here stay in your browser.
AI for Good
AI for Good is the United Nations platform on artificial intelligence, organised by the ITU. Its Innovate for Impact programme gathers AI use cases for the Sustainable Development Goals every year. AiCole took part in 2026 with the use case below, which we wrote: a publication, not an evaluation of our results.
Read the detail on the Results pageThe four-stage method, Coach’s architecture and the pilot classes’ feedback, as we described them to the ITU. Published in the 2026 AI Playbook, category “Generative AI for Creativity”.
The first three are each worked on separately. The fourth recedes once the other three hold.
Three areas to train · pick one
Turning the situation into maths.
Extracting the useful elements from a statement, setting aside what distracts, writing the situation in symbols.
Knowing what to apply, and in what order.
Choosing the property, formula or method that fits, organising the steps, justifying each move.
Getting the calculation right.
Once the model is set and the method chosen: calculating cleanly, following the rules, checking the result.
Their consequence
Freezing in front of the problem.
The student does not dare start, or gives up. It happens while the other three are not secure yet, and recedes as they get stronger.
Showing exercises: Modelling · Data filtering
Exercise type
The correction covers every written step, with an analysis of the errors and a detailed solution.
During an exercise, the Companion is designed to guide without giving the final answer: the solution is not passed to the model, and an automatic check rejects a reply that would contain it. The detailed solution comes after the correction.
Coach sends no notification to bring the student back. A session starts because they have a notion to work on, and ends with it.
The year, the subject, the interests the student chose and the work done in Coach. The AI models receive this learning profile and the student’s first name, never their e-mail address or account identifier.
Begun in 2023 and fed by teachers’ feedback, before AiCole was founded in 2024. Since then, the method has been built and tested in class, with teachers, mostly in maths.
AiCole works with the Ensemble Scolaire Notre Dame Saint Joseph in Épinal, a partner school: teachers there use Coach with their students as part of an educational experiment and send us their feedback. This feedback helps us improve the platform from the uses and needs observed in class.
The same Coach, at home and in class as part of a pilot. The tools for teachers are in development; those for schools are planned for the 2027 school year.
A chapter they are stuck on, a test coming up, the Brevet or the Bac to prepare: what Coach changes for a student.
What your child does in Coach, what happens when they get it wrong, their data, and the price.
Coach in class as part of a pilot (available), and the teacher’s role. Teacher Assistant is in development; the school layer is planned for the 2027 school year.
In 3e and Terminale: a Brevet blanc and a Bac blanc, timed or assisted, with worked answers for every question.
Free during the beta, no bank card. The student picks their year, chooses a chapter and begins with the lesson.
Teacher or school? Discuss a pilot