Every teacher knows the moment: in June you discover that a child stopped understanding in October. In the early years that delay is decisive. A four-year-old who does not grasp quantity becomes an eight-year-old who "is bad at maths", and a child with ADHD, dyslexia or dyscalculia gets the same exercise and the same test as everyone else until the gap becomes failure.
We created MathCracks so that no child falls behind unseen. Schools already collect a huge amount of evidence about learning, but nobody turns it into action while there is still time. We wanted a system that adapts every session to each child from age 2, lets children who cannot read yet learn on their own with a voice that guides them, recognises each child's support needs, and warns the teacher weeks before a child, a class or a topic falls behind.
We also saw that nobody can tell where learning breaks down: which lesson, which page of the textbook, which prerequisite. MathCracks makes that visible to teachers, schools and publishers, so that the next lesson and the next edition of the book are better for every child.
A five-year-old opens the app and Cubi, our guide, reads the task aloud: "Count the puppies". The child touches the answer; no reading or writing needed. The interface changes with age, and every instruction can be heard again.
Behind each session is OLA, our adaptive engine: yesterday's mistakes come back first, and the child advances, repeats or reviews earlier skills according to real mastery, with thresholds tuned for each age band. Practice follows the official curriculum of the child's country and school, session by session, from age 2 to the end of secondary.
The teacher records each child's support needs from a catalogue of 16 (ADHD, dyslexia, dyscalculia, autism, low vision, hearing or motor disability, language disorder, Spanish as a second language, high ability...) plus any the school adds. The platform adapts presentation, wording, session length and grading without changing what is assessed.
Every morning, seven early-warning detectors compare each child with their own history and with their class. A sudden drop, a struggling class, a failing topic or a wave of inactivity triggers an alert to the right person, with the evidence behind it. Two to six weeks later the system checks whether the child recovered.
For schools and publishers, the "living textbook" shows which lesson and which pages children get stuck on.
MathCracks started in Spain and is now used in 19 schools in Spain, Mexico, Venezuela and Honduras, on iOS, Android and the web. Schools adopt it as a whole-school platform: the same system serves preschool, primary and secondary, every subject, and the official curriculum of each country, adapted by each school.
It spreads school to school through teachers and directors: once a school sees the early-warning alerts and the adapted support for children with learning needs, colleagues in other schools ask for it. Our first school customer is already paying, which makes the model independent of grants.
We are now working with textbook publishers in Latin America, who want the "living textbook" to see where children get stuck in their books and to offer adaptive practice aligned with their own lessons. Each publisher can bring MathCracks to thousands of schools at once.
Because the curriculum lives in a single country registry, adding a new country is a configuration task rather than a rebuild. We already support the curricula of Spain, Mexico, Venezuela, Honduras, Bolivia and Paraguay.
MathCracks began as adaptive maths practice for primary and secondary students. Listening to teachers, we extended it in three directions.
Down to the youngest children: we added Maternal (age 2) and Preschool levels, a pre-reader mode in which Cubi reads every instruction aloud with natural recorded voices, and answers by touching and manipulating objects.
Across the whole school: every subject and every country's official curriculum, lesson plans, adapted exams, photo grading of handwritten work and report cards, so that the data needed for early warning is produced as part of the teacher's normal work.
Towards inclusion and early action: the catalogue of 16 support needs, the seven early-warning detectors with follow-up of each alert, and the living textbook for publishers.
Schools can request a pilot at https://mathcracks.com or by writing to colegios@mathcracks.com. We set up the school with its own curriculum, classes and teachers in a few days, and train the teachers online. Children use the app on any tablet or phone (iOS or Android) or on the web; no special hardware is needed.
Families can download MathCracks from the App Store or Google Play.
Publishers interested in the living textbook can contact us at the same address for a demo with their own books.
Note: the introduction video on this page is narrated with an AI-generated voice; the screens are from the live product, with demo data.
