Topic
Mastery Measurement
What a “mastered” cell is allowed to mean — and the evidence that licenses the claim.
Writing — 02
Mastery Measurement
What mastery measurement actually measures
Jun 2026
2 min
2 min
Psychometrics & EDM
Bayesian Knowledge Tracing, honestly
Apr 2026
2 min
2 min
Related cases — 02
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.
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.