Self-explain each step as you work through an example
Pause after each step in a worked example and explain to yourself, in your own words, why that step was taken.
Key takeaways
- What it is: Pause after each step in a worked example and explain to yourself, in your own words, why that step was taken.
- Why it works: Self-explanation is the mechanism that converts a passive reading of an example into active schema construction. When a learner explains a step to themselves, they must integrate the step with prior knowledge, identify what rule or principle it instantiates, and detect gaps in their own understanding. Research by Chi and colleagues showed that high-self-explainers learn substantially more from the same examples than low-self-explainers, even controlling for study time.
- Evidence: Backed by randomized trials / meta-analyses.
- Avoid: Explaining the steps descriptively ("then it multiplies by 2") rather than principally ("it multiplies by 2 because the target unit requires squaring the linear measure"), which records procedure rather than building schema.
Why it works
Self-explanation is the mechanism that converts a passive reading of an example into active schema construction. When a learner explains a step to themselves, they must integrate the step with prior knowledge, identify what rule or principle it instantiates, and detect gaps in their own understanding. Research by Chi and colleagues showed that high-self-explainers learn substantially more from the same examples than low-self-explainers, even controlling for study time.
How to do it
- 1Cover or close your notes after reading each step in an example.
- 2Say or write out loud: "This step makes sense because [principle/rule]. I know that because [prior knowledge]."
- 3If you cannot explain a step, mark it as a gap and revisit it — that is exactly where a schema is missing.
- 4Do not move to the next step until you can explain the current one without looking.
What the evidence says
RCT / meta-analysisChi, Bassok, Lewis, Reimann & Glaser (1989) showed that students who spontaneously self-explained while studying worked examples substantially outperformed those who did not, on both near and far transfer tests. Self-explanation training has since been validated in multiple contexts.
Honest caveat: Self-explanation imposes some extra time cost upfront; learners under severe time pressure may partially short-circuit it, reducing but not eliminating the effect.
- — Chi et al. (1989), Self-explanations: How students study and use examples in learning to solve problems, Cognitive Science
Common mistake
Explaining the steps descriptively ("then it multiplies by 2") rather than principally ("it multiplies by 2 because the target unit requires squaring the linear measure"), which records procedure rather than building schema.
IX Coach prompts self-explanation after each example step, surfacing the gaps in your understanding in real time rather than discovering them later during independent problem-solving.
Practice this with IX Coach →