Topic
Psychometrics & EDM
Item Response Theory, Bayesian Knowledge Tracing, and educational data mining, kept honest.
Writing — 02
Psychometrics & EDM
Translating IRT for people who build products
May 2026
2 min
2 min
Psychometrics & EDM
Bayesian Knowledge Tracing, honestly
Apr 2026
2 min
2 min
Related cases — 03
01A mastery model that survived a real curriculum
How we replaced a checklist of standards with a mastery model that teachers could act on — and that statistics could defend.
Knowledge tracing without the black box
Bayesian Knowledge Tracing made legible to the people who teach and the people who build — not just to the model.
An item-validation pipeline teachers trust
A gate that lets only well-evidenced items into the live bank — and tells you, in plain terms, why an item was rejected.