Learning By Teaching¶

Strategy · All strategies
Evidence · 2 claims (1 for, 1 mixed) · 6 studies (3 quant-synthesis, 2 causal, 1 review), q3–q4 · 5 of 6 report an effect size

Description¶

Learning by teaching asks learners to take instructional responsibility for material — explaining it to a peer, tutoring a younger student, or producing an explanation for an audience. The strategy works through two mechanisms: the expectation of teaching drives deeper, better-organized study, and the act of teaching forces retrieval, elaboration, and gap detection. It is carried out through structured activities such as reciprocal peer tutoring, jigsaw roles, or "teach-back" moments embedded in lessons.

Design Implications¶

Teaching is a highly generative activity: explaining requires retrieving knowledge, organizing it coherently, and monitoring a listener's comprehension, all of which strengthen the tutee's own understanding Retrieval practice improves retention. [+S]. Merely expecting to teach improves learning even before any teaching occurs, because it changes how learners study [~M]. The benefits depend on the tutee actually engaging in substantive explanation and feedback — superficial tutoring behaviors (reading aloud, giving answers) produce little gain.

Context¶

Requirements¶

• Sufficient prior knowledge to explain the material; tutees need preparation time and source material
• A structured protocol (what to explain, what questions to ask) — unstructured tutoring drifts toward answer-giving
• A feedback or reflection step so the tutor notices and repairs their own gaps (Reflection, Coaching)

Constraints¶

• Tutors with weak knowledge can entrench misconceptions and pass them to tutees [-M] — tutor errors go uncorrected without instructor oversight
• Tutors often default to telling rather than explaining; without training in questioning, the interaction degrades [-M]
• High cognitive load for novices: simultaneously managing content, pedagogy, and social interaction can overload working memory Cognitive overload degrades learning. [~M]
• Benefits shrink when the tutor simply restates source text verbatim rather than generating explanations [~S]

Implementation Variability¶

• Teach-back: brief end-of-session explanations to a partner; low preparation cost
• Reciprocal tutoring: pairs alternate tutor/tutee roles across problems, distributing load
• Teaching expectancy: learners study "to teach" but the session is replaced by another task — useful when tutor quality cannot be assured
• Jigsaw: each member masters one segment and teaches it to the group

Target Learners¶

• Learners with moderate prior knowledge — enough to explain, not so much that teaching is redundant [~M]
• Struggling learners benefit as tutees receiving one-on-one explanation; they benefit as tutors only with strong scaffolding
• Less suitable for complete novices, who lack the knowledge base to generate accurate explanations

Target Learning Goals¶

• Conceptual understanding and self-explanation of relationships, not just recall
• Metacognitive monitoring: teaching exposes "known unknowns" when explanations stall
• Communication and organization of knowledge for an audience

Instructions¶

1. Assign the material and a clear audience ("teach X to your partner so they can solve Y").
2. Give structured preparation time with source material and an explanation outline (Advance Organizers).
3. Have learners teach in pairs or small groups, using a protocol that requires questions and checks for understanding (Coaching).
4. Close with a reflection step where tutors identify what they could not explain well and revisit it (Reflection).
5. Verify learning with an individual assessment so accountability does not rest on the tutoring interaction alone.

Related Strategies¶

• Peer Tutoring — the reciprocal, program-level version of the same mechanism
• Self-Explanation — teaching is self-explanation directed at an audience
• Jigsaw Classroom — cooperative structure built entirely on learning-by-teaching roles

Examples¶

• Peer-Assisted Learning Strategies (PALS) — widely researched reciprocal tutoring program for reading and math in K–12 classrooms (https://ies.ed.gov/ncee/edlabs/regions/southeast/plc/PALS.asp).
• Jigsaw Classroom (https://www.jigsaw.org) — Aronson's cooperative structure where each student teaches their segment to their home group.
• Teach-back in medical education — trainees explain a procedure or concept back to an instructor, who diagnoses gaps before certification.

Key Sources¶

• Fiorella, L., & Mayer, R. E. (2013). The relative benefits of learning by teaching and teaching expectancy. Contemporary Educational Psychology, 38(4), 281–288. doi:10.1016/j.cedpsych.2013.06.001
• Roscoe, R. D., & Chi, M. T. H. (2007). Understanding tutor learning: Knowledge-building and knowledge-telling in peer tutors' explanations and questions. Review of Educational Research, 77(4), 534–574. doi:10.3102/0034654307309920
• Nestojko, J. F., Bui, D. C., Kornell, N., & Bjork, E. L. (2014). Expecting to teach enhances learning and organization of knowledge in free recall of text passages. Memory & Cognition, 42(7), 1038–1048. doi:10.3758/s13421-014-0416-z
• Bargh, J. A., & Schul, Y. (1980). On the cognitive benefits of teaching. Journal of Educational Psychology, 72(5), 593–604.
• Fiorella, L., & Mayer, R. E. (2015). Learning as a generative activity: Eight learning strategies that promote understanding. Cambridge University Press. doi:10.1017/CBO9781107707085