Creating materials to teach others also reinforces your own memory. There is an experiment that shows that if you write an explanation of how to solve a puzzle after solving it, your subsequent test scores will be significantly higher than if you do nothing!
Di Stefano, G., Gino, F., Pisano, G. P., Staats, B. and Di-Stefano, G, “Learning by thinking: How reflection aids performance”, Boston: Harvard Business School, 2014.
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