MARJ
SIGN IN

Browse

Nine columns, three difficulty levels, 124 topics. Every lesson leaves you with a working thing.

LevelSort
DT-05L3"A Study Showed That…": How to Actually Read a PaperOne real paper evaluated against a six-question checklist, with a verdict you can defendTL-07L1A Calendar and Task System You'll Actually KeepA working two-part system — one calendar, one task list — set up and run for real for three daysDT-09L1A Four-Step Protocol for Verifying a SourceYour own four-step verification checklist, applied to three claims you actually ran into this weekLN-05L3A New Skill in 20 Hours: The Fast-Learning ProtocolA 20-hour plan for one real skill: deconstructed into sub-skills, the highest-leverage 20% chosen, and the first practice session doneSO-03L1Active Listening: The Most Discussed, Least Practised SkillA listening audit across three real conversations, with counted behavioursLN-01L1Active Recall and Spaced Repetition: Studying That Actually WorksA spaced review schedule built for a real exam, with your first recall session doneAI-14L3AI Agents and Automation ChainsOne live automation that runs an AI step by itself: a trigger, an AI action, and an outputAI-17L1AI Ethics and Your School's Policy: Where Learning Ends and Cheating StartsYour own written rule for using AI on schoolwork, checked against your school's actual policyTL-10L3Automation: Killing Repetitive Work with Zapier, Make or n8nA live automation that runs by itself: a trigger connected to an action, tested and workingSO-04L2Body Language: What Actually Reads, and What's a MythA self-audit of your default body language on video, with two nervous tells named and two signals to adjustAI-13L3Build Your First Tool Without Knowing How to CodeOne small working app or tool you built with AI and can actually useAI-10L2Build Your Own Assistant: Projects and Custom GPTsThree working assistants for jobs you actually repeat, each with a tested instruction setMN-11L1Building a Budget and a Cash-Flow SystemA working budget from your own real numbers, plus a simple system that runs each weekTL-05L1Building a Personal System in NotionA working personal dashboard in Notion: a task database, a notes area, and one linked viewMN-15L3Building a Portfolio: Asset Allocation and RebalancingYour own written allocation — a target split, an index vehicle per sleeve, and a rebalancing ruleTC-13L3Building a Project End to End: Idea to LiveOne idea taken from concept to a shipped first version — scope cut to an MVP, built, and put in front of one real userLN-02L2Building Your Own Study SystemA working capture → process → review study system, set up in the tools you already use, running for one real subjectAI-15L3Calling AI From Your Own Code: The API, Explained ProperlyA working script that sends a prompt to a model's API and uses the responseTL-03L2Cleaning Messy Data Into Something UsableOne real messy dataset cleaned into a tidy table you can actually analyseCR-05L2Cold Email and Networking: The Message That Gets a ReplyFive personalised cold messages actually sent, built on a reusable structureMN-04L1Compound Interest: The Maths of Time (and of Debt)A modelled scenario in a spreadsheet: the same money as savings and as debt, on one chartSO-10L2Conflict Resolution: Argue About Needs, Not PositionsA two-column needs map for a real disagreement, plus a recorded rehearsalSO-15L1Consent and Dating Ethics: Clear, Revocable, Non-NegotiableConceptual clarity — a written account of what consent is and the situations that make it absentDT-03L1Correlation Is Not Causation, With Real ExamplesFour real causal claims taken apart — for each, the four possible explanations tested and the most likely one namedMN-13L2Credit, Credit Scores and the Maths of BorrowingA repayment analysis of one real loan or card — total cost, and the effect of paying more than the minimumMN-09L2Crypto: Where the Technology Ends and the Speculation BeginsA framework that separates the technology, the token, and the bet for any crypto claimTC-08L2Databases and SQL: Your First 8 QueriesEight working SQL queries run against a real table, answering real questions about the dataDT-10L2Decision Frameworks: Expected Value, Reversibility, Opportunity CostOne real decision run through the frameworks: expected value estimated, reversibility and opportunity cost assessed, a defensible choice madeLN-04L2Deep Work and Focus: Training Attention as a SkillOne designed deep-work block, run and logged, with your single biggest distraction removed by frictionTL-12L1Design Tools: Canva and Figma BasicsOne finished, exported design asset made with deliberate layout choicesCR-08L2Evaluating a Job Offer: Comparing Roles Beyond the SalaryA weighted comparison of two real (or realistic) offers across the factors that actually matter, with a decision and the questions to ask before saying yesLN-03L2Exam Strategy: Time, Question Selection, GuessingAn exam-day protocol for one real exam: a time budget per section, a triage order, and a guessing rule matched to its mark schemeDT-11L3Fermi Estimation: Producing a Number When You Have No DataThree Fermi estimates worked start to finish, each with its assumptions listed and a sanity-check against realityTL-09L1File Architecture, Naming and BackupsA folder structure and naming convention set up on your own files, plus a working backup of what you can't afford to loseCR-06L1Finding Work Experience: Internships, Shadowing and VolunteeringA target list of 10 realistic places and a tailored outreach pitch you can send this weekSO-05L2First Impressions: The Warmth and Competence AxesA recorded first-meeting rehearsal scored on both axes, plus your two warmth signals and two competence signals identifiedCR-07L3Freelancing: Pricing Your Work and Writing a Proposal That WinsA pricing sheet for your service (with your real number worked out) and a reusable proposal templateAI-18L3Getting Paid for AI Skills: Portfolio, Freelance, Packaging a ServiceA packaged service offer: one clear service, a price, and a portfolio piece proving you can do itTC-06L2Git and GitHub: Version Control and Why Undo Is Non-NegotiableA published GitHub repository with a real commit history and a README, that you built from the command lineSO-12L2Giving and Taking Feedback: The SBI ModelReal feedback, delivered using SBI, plus a recorded rehearsal of receiving hard feedback wellTL-11L2Google Workspace Properly: Forms, Apps Script, Sharing LogicAn automated form flow: a Form that feeds a Sheet and triggers an action, plus deliberate sharingSO-06L2Group Dynamics: What Happens the Moment You Walk InA recorded 'joining a group' rehearsal, plus a read of one real room mapped before you entered itAI-07L2Hallucination Hunting: A Protocol for Verifying OutputA four-step verification checklist, applied to a real answer with the errors found written upPS-07L2Handling Q&A — Including Questions You Can't AnswerA Q&A prep sheet: your five most likely hard questions with answers, plus your scripts for the ones you can't answerMN-02L2How a Share Gets Priced: Supply, Demand, Market Cap, P/EThe ability to read a single real stock — its size and the expectation baked into it, not just its priceDT-02L1How Charts Lie: Eight Manipulation TechniquesA detection list of the eight techniques, applied to three real charts found in the wildDT-12L1How the Algorithm Knows YouA before/after record of your own feed — the 20-click experiment run on a real accountTC-02L1How the Internet Works: DNS, HTTP, Servers, BrowsersA traced request: every step between typing a URL and the page appearing, written in your own wordsSO-09L2How to Open a Hard ConversationA written prep sheet and a recorded rehearsal against an AIAI-03L1How to Use ChatGPT, Step by StepA configured workspace with custom instructions, one working Custom GPT, and a data file analysedAI-02L1How to Use Claude, Step by StepA configured workspace, a working Project, and your own prompt templateAI-11L2Image Generation: Prompt Language, References, ConsistencyA small image set built to a brief — consistent style, with references and controlled variationMN-03L1Index Funds and ETFs: Why This Is the Right Answer for Most PeopleA written comparison of a single stock, an active fund, and an index fund — on cost, spread and evidenceMN-07L2Inflation, Interest Rates and Currency: How the Three Turn Each OtherA mechanism map connecting inflation, rates and currency — applied to your own real numbersCR-04L2Interviews: The STAR Method and the Hard QuestionsA bank of STAR answers to the common questions and one full mock interview rehearsed against an AITL-08L1Keyboard Shortcuts: Buying Back Three Hours a WeekTen shortcuts you didn't already use, drilled to muscle memory over a week, with the mouse-reach they replace namedCR-02L1LinkedIn: Building Findability, Not a ProfileA live LinkedIn profile built to be found, with a headline, About section and three real connectionsDT-08L2Logical Fallacies: Where an Argument Actually BreaksTen fallacies you can name on sight, applied to three real arguments — with one of them steelmanned instead of dismissedSO-17L2Making and Keeping Friends: Why It Gets Harder After 18A friendship audit plus a concrete plan: one existing tie to deepen and one new connection to start, with the first action takenPS-06L1Managing Presentation Anxiety, TechnicallyA tested pre-talk routine and a memorised, drilled first thirty secondsPS-03L2Narrative Structure: Why Stories Outlast FactsOne real message, pitch or section rebuilt as a story with a clear structure — a before/after showing the differenceSO-11L3Negotiation: BATNA, Anchoring and the Zone Where a Deal ExistsA completed negotiation prep sheet with both BATNAs costed, plus two recorded rehearsalsSO-19L2Networking: Building Relationships, Not Running TransactionsA 10-person map, plus two genuine reconnection messages sentTL-06L2Note-Taking: Collect Connections, Not NotesA small note system built around linking ideas: five real notes, in your own words, connected to each otherMN-08L1Opening Your First Investment Account — Including Custodial Accounts Under 18An investment account opened (or a custodial one set up with a parent), ready to useDT-06L3p-values, Statistical Significance and Effect SizeA concept map plus one real study read for what its p-value does and doesn't claim, alongside its effect sizeCR-09L2Personal Brand and Publishing Your WorkA simple publishing plan: your niche, your platform, and your first piece published this weekPS-10L2Persuasion in Writing: Email, Proposal, ApplicationOne real persuasive message rebuilt on the structure, with a before/after and a single clear askPS-04L2Presenting Data: Which Chart When, and When No Chart At AllA chart decision table, and one of your own charts rebuilt with a headline and honest axesSO-14L2Pressure Tactics: How a Hard Sell Works and How to Slow It DownA detection list of the seven tactics, plus one real pressured decision slowed down and re-madeTC-04L1Python From Zero: The First 10 ConceptsYour first program: a working script that takes input, makes a decision, and does something usefulMN-06L3Reading a Company's Financials: Balance Sheet and Income StatementOne real company analysed from its own filing, with six ratios computed and written upDT-01L1Reading Data: Mean, Median, Spread — and the Lie of the AverageThree real datasets summarised correctly — mean, median and spread — with the misleading summary identified in eachLN-06L2Reading Technical Material: Docs, Papers, ManualsOne real technical document read with the three-pass method: a one-paragraph summary and three questions it left openSO-22L2Rehearsing with AI: Build a Roleplay PartnerA working rehearsal bot, two recorded transcripts at different difficulties, and your own scenario libraryMN-05L2Risk, Volatility and DiversificationYour own risk profile — horizon, capacity and temperament written down, and a fund's drawdown checked against itAI-16L3Running a Model Locally: Privacy, Cost, LimitsAn open model running on your own machine, and a clear-eyed comparison to the cloud versionsPS-11L3Running Meetings and PanelsAn agenda and facilitation plan for one real meeting, run once, with decisions and owners capturedMN-14L2Salary Negotiation: Gross vs Net, Benefits, the Counter-OfferA negotiation script for a real (or realistic) offer, with the take-home and total package worked outDT-04L2Sampling, Survey Design and Why Most Surveys Are JunkA teardown of three real surveys or polls with each one's fatal flaw named, plus one leading question rewritten neutrallyTC-11L1Security Basics: Password Manager, 2FA, and the Anatomy of PhishingA secured account set: a password manager in use, 2FA on your key accounts, and passkeys where offeredPS-08L3Selling an Idea in Three MinutesA recorded three-minute pitch, timed, plus a scored self-review of the playbackSO-08L1Setting Boundaries and Saying No: Four ScriptsFour boundary scripts written in your own words, and one of them used for realTC-10L2Ship Your Own Site: Domain, Hosting, DeployOne real website live on the internet at a URL you can send to anyonePS-02L1Six Rules for Slides (and PowerPoint's Bad Defaults)One real slide, redesigned — before and after — following the six rulesSO-18L2Speaking Up in a Group: Getting Your First Sentence InA recorded group-discussion rehearsal where you enter in the first two minutes and reclaim the floor once after being cut offTL-01L1Spreadsheets From Zero: Formula Logic and Your First 15 FunctionsA working budget sheet built from your own real numbers, with 8+ functions and no hard-coded valuesTL-04L3Spreadsheets, Level Three: Dynamic Arrays, Power Query, DashboardsA one-page live dashboard that updates itself when the underlying data changesTL-02L2Spreadsheets, Level Two: XLOOKUP, Pivot Tables, Conditional FormattingAn analysis sheet joining two real datasets, with a pivot table and rule-based highlightingPS-05L2Stage Mechanics: Voice, Posture, Pace, Pauses, Eye ContactA recorded two-minute delivery, scored on the five mechanics, with your worst one drilled and re-recordedSO-07L3Status and Hierarchy: The Unwritten Rules of a RoomA read of the status dynamics in one real group, where you sit in it, and one deliberate status adjustment tried and loggedCR-11L3Studying or Working Abroad: Applications, Funding, Tests, BudgetAn application calendar for one real abroad opportunity: deadlines back-planned, tests scheduled, funding sources listed, and a realistic budgetAI-06L2Studying With AI: Feynman, Mock Exams, Error HuntingYour own exam bot: a saved study assistant that quizzes you, marks you, and finds your gapsLN-09L2Teaching to Learn: The Feynman Technique, Run With AIA plain-language explanation of one concept, the gaps it exposed listed, and one gap re-learned and re-explainedDT-07L1Ten Cognitive Biases and Where You'll Meet Them TodayA diagnostic card of the ten biases, each matched to one real moment from your own last weekLN-08L1Test Anxiety and Thinking Under PressureA pre-exam routine tested once, plus the expressive-writing technique tried before a real or mock testAI-04L1The Anatomy of a PromptYour own five-part prompt template, plus three saved templates for jobs you actually repeatMN-10L2The Anatomy of a Scam: Ponzi, Pump and Dump, Signal GroupsA detection list of the common financial scams, applied to three real examples found onlineSO-13L1The Anatomy of an Apology — and What Isn't OneA written apology for a real situation, tested against the five parts and stripped of every fake moveCR-01L1The CV / Résumé That Actually Gets ReadA finished one-page CV with every bullet rewritten as an outcome, tested against a real job adTC-12L3The Limits of AI-Written Code: How Far You Can Trust ItOne piece of AI-written code audited — at least two real problems found and fixed, and written upSO-01L1The Mechanics of Interaction: Turn-Taking, Signals, RepairA mental model of conversation as a system, plus a logged observation of three real conversations' mechanicsPS-09L3The Mechanics of Persuasion: Evidence, Credibility, Pre-empting ObjectionsAn argument map for a real position: claim, evidence, the strongest objection, and your answerLN-07L1The Mechanics of Procrastination: Why It Happens, What It's DoingA procrastination-intervention plan for one task you're avoiding: the feeling named, the next physical action defined, one friction removedMN-12L2The Real Cost of Money: Fees, Spreads and What the Platform TakesA fee audit of one account, app or platform you use, with the annual cost — and its long-term compounded cost — calculatedPS-01L1The Skeleton of a Talk: Message → Structure → Slides, In That OrderA one-page talk plan: one message, three sections, and a slide list you haven't built yetSO-02L1The Small Talk Protocol: Your First Five Minutes With a StrangerA recorded rehearsal of a first conversation, plus three real small-talk attempts loggedTC-03L1The Terminal: Your First 20 Commands and Why It Still MattersReal work done in a shell: files organised, renamed in bulk, and searched — all from the command lineSO-21L1Timing: Choosing When to Have the ConversationA timing checklist, and one conversation actually scheduledSO-20L1Tone in Writing: Texts, Email, SlackFive of your own messages rewritten, with the specific reason each original misfiredSO-16L2Trust: How It Gets Built, Spent and LostA trust audit across five relationships, plus one repair actually attemptedCR-10L2University, Trade, or Building Something: A Decision FrameworkA decision analysis for your own path: the goal named, options scored on requirement/cost/reversibility, and the next concrete stepAI-12L3Video and Voice: Script → Clip → VoiceoverOne finished 30-second video built end to end: script, visuals, voiceover, captionsTC-01L1What a Computer Actually Does: CPU, RAM, Disk, OSA labelled model of what happens when you open an app — the job the CPU, RAM, disk and OS each doAI-01L1What a Language Model Actually DoesA tested mental model — three experiments run on a real model and written upTC-07L2What an API Is and How to Call OneA working script that fetches live data from a real public API and does something with itMN-01L1What Are You Actually Buying When You Buy a Stock?The ability to read an order book, and to see a share as ownershipAI-05L1Which Model for Which Job? A Comparison You Can Actually UseYour own decision table matching model tiers to the jobs you actually doAI-09L2Working With Data: Upload a Spreadsheet, Get Real AnalysisOne real dataset analysed and charted by AI, with the key numbers verified by handAI-08L2Working With Long Documents: Interrogate, Don't SummarizeOne real long document analysed — not summarised — with claims cross-examined against the sourceCR-12L2Your First 90 Days in a New JobA 30-60-90 day plan for a real (or imminent) role: what to learn, who to meet, and one early win identifiedTC-09L1Your First Page With HTML and CSSA styled web page you built by hand — real HTML and CSS in one file, opened in a browserTC-05L2Your First Real Script: Automate Something You Do by HandA working script that automates one real, repetitive task you actually do — run successfully on your own filesCR-03L2Your Portfolio: What Do You Have to Show at 18?A published portfolio page with three pieces of work, each with a one-paragraph write-up