Adaptive learning moves away from a single linear path through a course. The platform observes how a learner answers diagnostic questions, how long they spend on each concept, and which prerequisite gaps surface — then picks the next item from a curated library. Two well-studied model families dominate:
- Item Response Theory (IRT) — estimates learner ability and item difficulty as latent variables; widely used for high-stakes adaptive testing (GRE, GMAT).
- Bayesian Knowledge Tracing (BKT) and its neural extensions (DKT, SAKT) — model the probability that a learner has mastered a knowledge component, updated after every interaction.