Teaching to learn is one of the generative activities that intrigues me. This may partly be a function of personal experiences as a teacher. Being put in the position of having to stand in front of others and explain requires something different from the study of a topic. Just what is different though. I intend to offer a couple of posts based on research to answer this question.
The first explanation is based on research claiming the preparation to teach amounts is a variant of the retrieval practice effect. Retrieval practice involves attempts to recall the content to be studied. This is best done with recall that does not involve prompts such as would be the case with multiple choice questions. Something like flash cards with general requests for recall/explanation would be an example.
A study by Koh and colleagues (reference at the end of the post) was designed to test this hypothesis.
The study involved four groups – a control group that studied the assigned content; the teaching group that studied the material and taped a 5 minute presentation without notes; a group that studied and then delivered a 5 minute presentation using a prepared script; a group that studied and then completed free recall questions about the material.
Consider what is required in each treatment. The teaching group not allowed to use a script had to rely on what they knew when making their presentations. The group allowed to use a script could rely on the external source of information. The free recall group used an established method of retrieval practice.
Both the teaching group and the retrieval practice group performed better on a later test than the control condition which involved traditional study behavior. The group that taught with the use of the script did not. The authors argued this pattern supports the retrieval practice explanation.
This study was designed to test the value of retrieval practice and showed the two retrieval practice treatments were most effective. For classroom application, consider what was actually involved. Making a video is only part of what one does when teaching. It demonstrates a value in the requirement of using what you know to create a representation. This sounds like writing to learn or in this case multimedia content creation to learn.
Teaching involves other potentially important activities not testing in this research. What about interacting with students? Interaction is even more demanding than presentation as it is not totally under the control of the educator and involves more cognitive flexibility. There are other aspects of teaching that may also contribute to personal learning.
Koh, A. W. L., Lee, S. C., & Lim, S. W. H. (2018). The learning benefits of teaching: A retrieval practice hypothesis. Applied Cognitive Psychology, 32(3), 401-410.
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