How to teach your expertise to others without losing what made you good

Executive overview

Most leaders were promoted for being expert performers — then suddenly their job is to develop others. The gap between expert and novice is invisible from the expert's side, and that invisibility is the core problem.

The ha-ha metaphor captures it: from the house, the ditch disappears; from the park, the wall looks unclimbable. Effective teaching means crossing back to where the learner stands, not waiting for them to leap.

Experts forget the difficulty of getting there — and that forgetting is the biggest obstacle to teaching well.

What expertise actually is

• True experts rarely call themselves experts; they're more aware of how far they still have to go than how far they've come
• The word "just" — "you just sculpt a clouded leopard that size" — signals decades of internalized skill the speaker no longer notices
• Competence markers (surgeon, pilot) are a floor, not the full picture; becoming expert is an ongoing process, not a destination
• Expertise is never a state you achieve; stopping the journey is its antithesis

The ha-ha: why the gap is invisible from one side

• A ha-ha is a concealed ditch in English landscape design — seamless from the house, an unscalable wall from the park
• Experts in the "house" see the park and wonder why learners don't simply walk in
• Learners in the "park" see only the wall; the path across is invisible until they've already made the transition
• Once you've crossed, the pain of the crossing evaporates rapidly — memory of difficulty fades faster than the difficulty itself was felt
• Inspirational leaders join the learner where they are rather than waiting at the house

Listening as a teaching skill

• Sophie Yates (harpsichord teacher) treats each lesson as diagnosing what this person needs now, not delivering a fixed curriculum
• She listens to shape, silence, and overall trajectory — not just individual wrong notes
• She makes judgments about repertoire, timing, and readiness that the student cannot make because the student hasn't seen the next stage yet
• The learner's attention is consumed by the struggle; the teacher's attention is free to observe the whole

Less is more: deciding what not to point out

• The temptation is to list everything that could be improved — resist it
• Overloading a learner with corrections doesn't accelerate progress; it creates overwhelm and erodes confidence
• The skill is identifying the one thing that, if addressed now, would unlock movement at this particular moment
• Early wins build confidence; confidence creates capacity for harder feedback later
• Connect the specific correction to the bigger picture — the rare leader who names why it matters is the one people remember

Zone of proximal development

• Vygotsky's concept: the zone between what a learner can do alone and what they can do with expert help
• Too little challenge: boring, stagnant, no growth
• Too much challenge: demoralising, learner feels at sea
• The zone is fluid — it shifts as the learner develops; the teacher's job is to track it and recalibrate constantly
• Support must eventually fade: if the scaffolding never comes down, independence never forms
• Like holding a bicycle saddle — the moment it works is the moment you let go without them noticing

What changes when you research expertise deeply

• Experts who look settled from the outside consistently report feeling more aware of the infinite distance ahead than the distance already covered
• This is empowering, not deflating: the journey remains exciting precisely because it never fully ends
• Moving up through an organisation brings a responsibility to remember the struggles of earlier stages — and use them constructively rather than erasing them