Sebastián Sarmiento

Learning scientist · Curriculum engineer — Santiago, Chile

Back to
learning in
the world.

We use mathematics and AI to read the real systems of the planet and turn them into living learning, not isolated exercises. I work at the seam where psychometrics, data mining, curriculum, and product meet.

Read the manifesto
1,600 students · real-time

No one designed the school.
Everyone pushed it.

The school as we know it was not designed: it was the point where the State, the factory, the church, and the empire converged. Two hundred years later, we still teach inside that form — and in no discipline does it show more than in mathematics.

AI can take over the procedural — the algorithm, the technique, the practice that builds fluency — until mastery on any standardized test takes the least time possible. Let the test stop being the center and become a formality: let us break it by saturation, with everyone answering at a level where it can no longer stratify anyone.

And then the classroom is free for what no machine can answer: understanding why, and imagining solutions to water scarcity.

Challenging comfortable premises isn't for everyone. If you're ready to build what's next, start here.

Access the signal Read the full manifesto

Products

Product book →

In production: a bank of 700+ verified items generated with an AI pipeline and automated quality gates · 19 studies classified by ESSA evidence levels (I–IV) · item design and validation for the national university admission system · IB MYP mathematics leadership · work presented at ISTELive 25.

Essays

Full archive

Translating IRT for people who build products

Item Response Theory is not a reporting feature — it’s a way of deciding what a score is allowed to mean. Here’s the working translation for product teams.

Essay Psychometrics & EDM 2026

Bayesian Knowledge Tracing, honestly

BKT is four numbers and a strong assumption. Used honestly it’s a discipline for accumulating belief; used carelessly it launders guessing into certainty.

Research Note Psychometrics & EDM 2026

Topics

The intellectual index — 5 threads
  1. Mastery Measurement

    What a “mastered” cell is allowed to mean — and the evidence that licenses the claim.

  2. Learning Science → Product

    Translating measurement and learning science into product decisions that survive a classroom.

  3. Psychometrics & EDM

    Item Response Theory, Bayesian Knowledge Tracing, and educational data mining, kept honest.

  4. Math Education

    Curriculum, assessment design, and the unit as an argument rather than a checklist.

  5. AI in Curriculum

    Where AI serves the argument in a unit instead of the novelty — including work shown at ISTELive 25.