Teaching Somebody Else Is the Fastest Way to Learn It Twice

Somebody two years behind you asks how you got good at it. You have twenty free minutes and two options: send a link, which is what most people do, or sit down and walk them through the part that took you a year to work out.

Take the second one, and not because it is the kind thing to do. Take it because those twenty minutes are the sharpest audit of your own skill you will get this month. Explaining something out loud, in plain words, to a person who cannot quietly fill in your gaps for you, finds the places you have been faking faster than any amount of solo practice. They walk away with a shortcut. You walk away with a map of your own holes, which is the thing you cannot buy and cannot generate alone. Both of those are real, and the second one does not cost you the first.

Does teaching somebody else actually help you learn it?

Yes, and the effect starts before you open your mouth. John Nestojko, Dung Bui, Nate Kornell and Elizabeth Bjork had people study a passage either expecting a test on it or expecting to teach it to another student, and then tested everybody. The group that expected to teach recalled more, organized what they recalled better, and held on to the main points more securely, even though no teaching ever took place.

Reading something as material you will have to hand over changes how you process it while you are still reading. You start looking for the structure, the order things have to come in, and the objection somebody is going to raise, none of which you bother with when you are only reading for yourself.

Then the actual explaining adds the second half. Jeffrey Karpicke and Janell Blunt showed in Science that pulling knowledge out of memory produces more durable learning than elaborative study of the same material, and that the advantage held on the harder questions that require you to go beyond what was stated. Teaching is retrieval under load, in real time, with somebody watching. It is that technique in its most demanding form, and it comes disguised as a favor.

How do I teach a beginner the skill I am good at?

Twenty minutes, one problem they actually brought, and plain words. Ask what they are stuck on right now, work on their example rather than your favorite one, and ban every term you would have to define.

The plain words rule is where the value is. Jargon is compression, and compression hides gaps beautifully. The moment you have to say what the term means to somebody who has never heard it, you find out whether you know the thing or only the label for it. Do not prepare a lesson. A lesson lets you route around your weak spots without noticing; their question does not.

Watch for the stall. There is always one sentence where you slow down, hedge, say "it just kind of depends," and move on quickly. That sentence is the hole. Write it down the moment they leave and go study exactly that, because you have just been handed the most precisely targeted piece of practice available to you, identified by somebody who does not even know they did it.

Two other things worth doing. Show them the version that failed, not only the version that works, because the failure is where the actual knowledge lives. And answer the question they asked rather than the more interesting question next to it, which is the most common way experienced people waste a beginner's twenty minutes.

What is the difference between a mentor and a sponsor?

A mentor talks to you. A sponsor says your name in a room you are not in. Most people have never had the distinction explained, and it is the difference between advice and outcomes.

Herminia Ibarra, Nancy Carter and Christine Silva, writing in Harvard Business Review, quote a woman who had been at her company twelve years with nothing happening and who says she is now being mentored to death: years of coaching, career planning and development programs, and no advancement, because nobody with standing ever advocated for her where the decisions were being made. Mentoring is generous and it is not the same instrument.

Sponsoring costs about three sentences and one small piece of your credibility. In a room where a job, a project or an opportunity is being allocated, say the name, say the specific evidence, and say what you would trust them with. "Put Marcus on it. He rebuilt the reporting pipeline in six weeks and it has not broken since. He is ready for something with a customer attached." That is it. It is specific enough to be checked, which is what makes it worth something.

What comes back is not vague. Spend your standing on people who then do well and you build a track record as somebody whose recommendations are worth acting on, which is a reputation you cannot build by talking about yourself. That is the same machinery Ibarra and her colleagues found moving careers, pointed from the other end.

What do I actually say when I praise somebody in public?

Name the exact thing they did, say what it changed, and say it in front of the people whose opinion of them matters. "Great work" is noise and evaporates on contact. "She caught the pricing error two days before it shipped, and it would have cost us the quarter" is an event they will still remember in five years.

Specificity is the whole technique, and public is the multiplier. Gallup's research on recognition found that only about one in three US workers strongly agree they received recognition or praise for good work in the past seven days, and that when people describe the recognition they found most memorable, money is not the top answer. Public acknowledgment of a specific thing done well is scarce, it is what people say they remember, and it costs you one sentence.

Two smaller moves belong beside it and take minutes each. Make the introduction you could have kept to yourself, because the connection you are sitting on is worth far more in circulation than in storage. And champion somebody who did not ask, in a room where they will never find out you did it, which is the version with no reciprocity attached and the one that tells you most about what kind of operator you are becoming.

Is it too early for me to be teaching anybody?

Almost certainly not. Being two years ahead is a better teaching position than being twenty years ahead, because you can still remember what was confusing and you have not yet forgotten which parts are genuinely hard.

The expert's problem is that the thing became obvious to them, and obvious is useless to a beginner. You still know where the cliff is. You still remember the week you nearly quit and what got you through it. That is the exact material somebody one year behind you needs, and nobody further along can supply it as well as you can right now.

This also settles the timing question that stops most people. Teaching is not a thing you get around to once you have arrived. It is one of the ways you get there, and the people doing it while they are still climbing are getting the audit effect at the point in the curve where it is worth the most.

The generous version and the self-interested version are the same move

Kaʻohele Carlos, who founded KEEP CALM, describes this as one of the things his own career actually ran on. Across twenty years he looked for chances to coach, train, advise, lift up, commend and champion the people around him, and he says the energy and support that came back was tenfold. That is his account of his own twenty years rather than a law of nature, and it is worth what his twenty years are worth to you.

What is verifiable is the mechanism on your side of it, and the mechanism is not sentimental. Explaining out loud finds your gaps. Preparing to explain makes you learn better before you start. Saying a good person's name in a room builds you a reputation you cannot build by talking about yourself. Giving a precise note trains your eye for your own work. Every one of those is a practice technique that happens to leave somebody else better off, which is the least complicated kind of good deal there is.

So take the twenty minutes. Sit down with the person who asked, use their example, ban the jargon, and notice the sentence where you stall. Then go study that. You will be a better practitioner by Thursday, they will save a year, and neither of you had to wait until you had made it.

Sources

• Memory & Cognition, Expecting to teach enhances learning and organization of knowledge in free recall of text passages
• Science, Retrieval Practice Produces More Learning than Elaborative Studying with Concept Mapping
• Harvard Business Review, Why Men Still Get More Promotions Than Women
• Gallup, The Importance of Employee Recognition: Low Cost, High Impact