Microeconomics · a coached course

A coach that teaches by refusing to answer

A student reads a short passage, says what they think, and is challenged on it. Every easy answer meets the case that breaks it. What survives the challenge is theirs, and it is written down. Nothing is ever handed over.

The method: question against question

The Coach has five ways of pressing a student, and it chooses between them by what the student's answer actually did — not by where they are in the lesson.

Justify — what makes you say that? point to the passage Challenge — where is the exception? Extend — where else does this same structure appear? Escalate — what would change your mind? Contradict — you have said two things that cannot both stand

The last of these is the sharpest, and it uses nothing but the student's own words. The Coach keeps what each student has written, lesson by lesson, and when a new answer collides with something they committed to earlier it quotes them back to themselves, verbatim, sets the two side by side — and stops. It never says which one survives. That is the student's to decide.

"But look at what you said earlier: 'the money already spent is exactly what makes finishing necessary.' That claim says the size of past spending creates an obligation to finish… Now say what SK On was actually weighing — not how much it had already spent, but what."

15 distinct coaching approaches, in four levels

Put a chatbot in front of a student and the student stops thinking: ask, answer, paste. The Coach is built the other way round. It takes the student's answer seriously enough to work on it, and it has fifteen distinct coaching approaches, organised within four graduated intervention levels: the level rises with the tries, from the smallest nudge to a strong intervention, and within a level the Coach picks the approach by the kind of difficulty, what has already been tried, the headway made, and signs of fatigue. Ask what part was not understood; give a small hint; send the student back to recheck one spot; repeat a small part of the instruction; answer a simpler, similar question; offer one or two options; restate the question; ask them to say exactly what they do not understand; ask whether they have met this problem in their own life; a question to think differently; a partial answer to continue from; a short lesson on the mistake; a parallel problem; the answer re-explained as the text gives it; and, when the student is worn out, a five-minute break. Never the same approach twice in a row, and every reply records which one it used, so a professor can see them at work.

After five tries it does something deliberate. It offers to set the question aside — and it says plainly that doing so is recorded, and that the question comes back in the unit's recap with a reading beside it. The student chooses. If they would rather keep going, they get three more attempts from fresh angles. At the eighth it closes, and still does not give the answer.

The answer is never released. Not at the last try, not to a student who insists, not to one who says they are the professor, and not to one who claims to have given up. We attacked it thirteen ways to be sure. What a student does get is the one thing they have earned: when they reach the answer themselves, the Coach confirms it and explains exactly why it holds.

A method, not a syllabus: critical thinking, then strategic thinking

The second thing the course gives a student is a method, and each unit runs its five lessons in an order that is itself the argument: first critical — debunk the fallacies — and then strategic — falsify your own theory.

ConceptsThree ideas, built one at a time, each one discovered rather than stated.

Debunk the fallaciesPlausible, widely believed, wrong. The student states the argument, is shown the case that breaks it, and must replace it with something that survives.

The wizardA model they work with their hands.

Falsify the theoryBuild a claim, say in advance what would kill it, then meet the evidence. Amend or abandon — strategic thinking under a real test.

Recap & quizSixteen questions. Every option explained, right or wrong, and a miss sends the student back to the lesson it came from.

Debunking comes first because a student cannot reason strategically from a belief that is false. Falsification comes second because a claim nobody could disprove is not a claim. Together with the Learning Tree, these are the course's answer to the cognitive passivity that a chatbot invites: a student who is handed conclusions stops producing them, and these three parts cannot be done by anyone but the student.

The wizards: models a student works, not watches

Seven interactive models sit inside the course, and they are where the economics stops being words. The design rule throughout: predict before you touch it. A student commits to a guess, then moves the model and watches their guess fail — which is why the correction lands instead of washing over them.

Build your own axesGuess where a market clears on two rulers of prices you already know. Then stand the rulers up at ninety degrees and watch the supply and demand graph assemble itself, with the algebra solving live as you drag.

Nine everyday marketsA campus coffee cart, a rideshare queue, used textbooks, concert tickets — each with a shock to work through.

Equilibrium and elasticityReal commodities with calibrated axes: coffee, Brent crude, LNG. Shift a curve, read the surplus, compute an elasticity from your own movement.

The curve galleryGiffen goods, Veblen goods, the kinked demand curve — each posed first as a shape that should not be possible, and explained second.

One companion, not five tools

All of it is held together by the Coach, which is the only thing the student talks to. It knows what they said two lessons ago. It carries their Thinking Board — the findings that survived challenge, kept across the course. It draws on a library of classic texts the student chooses for themselves, from Smith and Ricardo to real government cases, and quotes them when one fits the point in hand. It works at whatever hour they do, at their pace, on a phone or a tablet, and it picks up where they stopped.

What you will see next week

Sign in with a nickname and a four-digit code — no email, nothing else held about you. Then choose a topic from the Learning Tree, or go straight into the course. Six units, thirty-one lessons, complete.

The honest way to test it is to be a difficult student. Give it a wrong answer you half believe. Argue back. Try to make it tell you the answer. Then give it a good answer and watch it say so, and say why.