How So What Club works
A guided climb from complete beginner to someone who can solve any business problem. No frameworks to memorise: you learn how industries make money, the moves companies make, and how to build an answer from first principles.
Five ideas behind everything here
Acumen, not frameworks. One method for any question, five moves: pin the question, write the maths of the goal, use what you know about the business, find the facts that decide it, and say so what. Nothing to memorise.
Industry literacy. How 45 industries really work: value chains, unit economics, cost structures, key measures, the players in each region, and what changed recently.
Strategic moves, with the economics. The moves companies make, such as vertical integration, make or buy, entry modes and pricing moves: when each creates value, when it destroys it, and the numbers to check.
Practice that proves it. Worked cases, a case simulator, practice gyms, online test practice, Partner mode for speaking out loud, and honest scoring with every rule published.
Free and global. Every learner, every country. Nothing to learn is behind a paywall.
Learn the core skills
A foundation teaches five moves that crack any case, plus case math, market sizing, exhibits, synthesis, and the fit interview, in plain language with key terms explained as you go.
Climb the case types
A module for each case type, one at a time, from guesstimates to the most involved. Each shows how to build the structure for that kind of question, with worked cases and drills. Industry briefs tell you where to look.
Practice until it is routine
Drill math, sizing, charts, and structure with instant feedback, work full cases step by step, then speak cases out loud with a partner using the interviewer script and scoring rubric.
Trust the numbers
Every calculation in the worked cases is recomputed automatically before release, and each lesson shows the date its facts were checked against sources so you know how current it is.
Everything on the site, counted
Every figure below is counted from the site's own content and code each time it is published, never typed by hand. Each block says whether you need a free account, and Try it opens the feature.
Lessons
376 lessons in 152 modules
From what a case interview is and the five moves that crack any case, to final rounds, with guides to every major industry, firm, region and online test, each showing when it was last reviewed.
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Try it: Open the curriculumIndustry briefs
45 industry briefs, each with a one-minute summary, across 8 sectors, compared side by side in the atlas
How each industry works and makes money: the value chain, a worked example that adds up, key measures, players by region and the first questions to ask in a case.
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Try it: Open the industriesBusiness model patterns
15 business model patterns that repeat across industries
Met an industry you have never studied? Spot its pattern, then ask the questions that pattern raises.
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Try it: See the patternsStrategic moves
20 strategic moves, with 89 sourced real examples from 5 regions
Integration, make or buy, entry modes, pricing, cost restructuring, platforms and more: when each creates or destroys value, the numbers to check, a worked example that adds up, and how to recommend it in a case.
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Try it: See the movesIndustry Gym
45 industries to train in short rounds built from the briefs
Which cost line is biggest, which measure matters most, where the profit sits: questions generated from the briefs, with the answer and a one-line why.
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Try it: Train industry senseWorked cases
307 worked cases, every number recomputed by a checking script
Each case shows a structure, the math step by step, the exhibits and a recommendation, filterable by type, industry and region.
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Try it: Open the case libraryCase simulator
297 cases you can run as a timed online-style case or an interviewer-led case
Type your structure, math and recommendation, and see which published checks each answer met and which it missed.
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Try it: Run a caseOnline test practice
4 online test formats with their own practice
Practice in formats like the screening tests firms use, each labelled as practice in a similar format, never the real test.
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Try it: Practise a formatAnswer out loud
41 MB one-time download for the smallest speech model, and no audio ever sent anywhere
Speak your structure or your close; your own device turns it into text, and the same published rules grade it.
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Try it: Open the simulatorPractice gyms
87 sizing, chart and structure prompts, plus case math that never runs out
Short drills with instant feedback for the skills every case needs: math, market sizing, exhibits and structuring.
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Try it: Open the gymsExample interviews
5 written example interviews, each a strong and a weak run
Read the same case done well and badly, with notes tied to the scoring rubric. Written examples, not recordings.
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Try it: Read an exampleStory workshop
4 fit interview dimensions to prepare a story for
Draft each story in the situation, task, action and result shape, with instant checks and the follow-up questions interviewers ask.
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Try it: Build a storyPartner mode
5 criteria on the interviewer's scoring rubric
Practise any worked case out loud with a friend: they get the script, the data to share and the rubric on their own device.
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Try it: Choose a casePractice Exchange
5 criteria in a blind two-way rating after each live session
Live case practice with other candidates, opening soon. Partner mode works today.
Opening soon
Try it: How it will workYour scorecard
7 skills measured against a published, versioned bar
See where you stand in each skill from your recent practice, and the one next step for your weakest.
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Try it: See your progressSkills check and plan
24 questions in the skills check that builds your plan
Find your weakest skill in about a quarter of an hour, then get a day-by-day plan up to your interview date.
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Try it: Take the skills checkApplications and CV check
18 published checks for your CV and cover letter, run on your device
Track every application and its next date, and check your CV before you send it. Nothing is uploaded.
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Try it: Open the trackerRecruiting calendar
52 calendar rows by firm and region, each with its source and the date we checked it
When firms open applications, test, interview and make offers, marked official or reported.
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Try it: Open the calendarGlossary and frameworks
311 terms in plain English, and 22 frameworks explained
Look up any business or case term, and see what each classic framework is, why reciting it fails, and how to build a structure from the question instead.
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Try it: Open the glossary
The honest standard
The practice here is built to match the rigor and style of a real first-round interview: the same case types, the same kind of math and exhibits, and a partner mode so you speak cases out loud. It is honest practice, and it does not guarantee an offer.
See how every score is gradedStart the climb at step one
Every step above builds on the foundation, and its first lesson starts from zero in plain English.