The Protege effect states that the best way to learn is to teach someone else. Students develop a better understanding and retain knowledge longer than those who study in more traditional ways. The Roman philosopher Seneca put it even more simply ‘While we teach, we learn’.

The method, also called learning by teaching was originally developed by Jean-Pol Martin in the 1980s. Click to watch a short video.

There are many theories written about learning and education but the ones that are always most powerful for me are those that you can evidence in some way from your own experiences or from the experiences of others whose opinion you value. And I would be very surprised if any of my teaching colleagues would disagree with the basic concept that no matter how much you think you know about a subject or topic, the very process of teaching always offers up new thoughts and insights, deepening your understanding.

The teacher might be the student

The argument hinges on the relationship between a teacher and learner. Traditionally the teacher is the expert who provides knowledge, the learner the one who receives it, but the teacher need not be the person who stands at the front of class, the teacher can be the student and the student the teacher.

This role reversal is not as odd as it at first might seem, a good teacher will always listen to the answer a student gives in order to evaluate their own performance. And if you think of it like that, who is teaching who?

But how does it work? Imagine you were asked to teach a subject to others in your peer group. Knowing you were going to have to explain a topic will increase your level of engagement with the learning materials. In addition, reflection will be far deeper as you continually ask, does this makes sense to me? This process of preparing, “prepping” is one of the reasons teaching improves learning but there are others. For example, the construction of the learning itself will require imagination and creativity, how exactly will I teach this subject?  It may be a simple verbal explanation, conversational even, or perhaps something more formal, requiring slides or additional illustrations. Once again you will be forced to reflect, possibly writing down some of your ideas and again asking questions, how long will it take, am I making myself clear, what questions could I be asked? Its at this stage that you may even find your understanding lacking, requiring you to go back over what you previously thought you knew.

There is research (Bargh and Schul 1980) to prove that preparing to teach in the belief that you will have to do so improves learning, however there is one final stage, the teaching itself.  In 1993 Coleman, Brown and Rivkin investigated the impact of actually teaching, eliminating the effects resulting from the interaction with students, their conclusions, that there was a significant improvement in performance of those that taught compared to the those who prepared but didn’t in the end teach.

In summary, although thinking you have to teach and going through the process to do so improves learning, following through with the actual teaching is even better.

Protege in practice

Bettys Brain (Vanderbilt University) – Bettys brain is a computer based, Teachable Agent that students can teach and in so doing learn. The students develop a visual map (A concept map) of their own knowledge, forcing them to organise their thoughts. There are resources available within the programme to help them develop a deeper undertesting of the subject. They then teach what they learned to Betty, who like any other student will face a test at the end. If she does not do well in the test it is a reflection of the quality of the teacher or perhaps more precisely their understanding of the subject.

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Lessons for students – This is not a plea for students to pair up and teach each other, as good an idea as this might be. It is a hope that by explaining why teaching helps you learn, it gives an insight into how we all learn. For example, it highlights that reflection, i.e. thinking back on what you know is so important, it shows that high levels of concentration are required, the result of knowing you will have to explain concepts and ideas to others, and it offers up some evidence as to why talking out loud as you do when presenting, consolidates learning.

A few other takeaways, why not imagine you have to teach the subject you are learning and study with a “teaching mindset”. Preparing notes as if you are going to teach, crafting ideas as to how you might explain it to others. Get involved in group discussions, try to answer other student questions as they might answer yours.

Oh, and don’t always assume that the person in front of you fully grasps what they are saying, they are still learning as well.