Stop collecting ideas. Start using them.
Who it's for, what you get, and where to start.
The School of Knowledge is the weekly newsletter for SME owners and investors who want frameworks they can actually use — frameworks, checklists, and operating manuals every weekend, built to read on Sunday and use on Monday.
If you’ve just subscribed — welcome. You’re in the right place.
This post will tell you exactly what to expect, who this is for, and where to start.
Who this is for
The School of Knowledge is built for three types of people:
The business owner who runs a profitable company but knows their decision-making could be sharper. You’re past survival mode. Now you want to allocate capital better, build systems that don’t depend on you, and think more clearly under pressure.
The operator-investor who puts their own money to work alongside running a business. You don’t have a fund manager. You have a balance sheet, a calendar, and your own judgement. You need frameworks that work in the real world, not the classroom.
The serious learner who is tired of business content that sounds good but doesn’t change how you act. You want ideas you can deploy on a Monday morning, not collect in a notebook.
If any of those sound like you, keep reading.
The 10 problems we solve
You consume more business content than you act on
You make capital allocation decisions without a repeatable framework
You don’t have time to read 400-page books or dig through case studies
Your mental models came from one industry — and they show
You understand your business operationally but not financially
You make decisions under uncertainty without a structured process
You can’t always explain your reasoning to others (or yourself)
You know what to do but not how to stress-test it before you do it
Your systems exist in your head, not on paper
You want to think like the best operators and investors — but most of what they’ve written is too abstract to use
What you get
Every Sunday, free: The Weekly — a short framework, decision, or question drawn from real operator experience. Always free.
Every Saturday, for paid members:
The Lab — essays on mental models, systems, and ways of thinking. The big ideas, made deployable.
The Case Library — deep research on businesses and operators. The kind of analysis that takes weeks to produce.
The Toolkit — calculators, templates, and checklists. Things you download and use, not just read.
The Nuts and Bolts — operating manuals for business fundamentals. Accounting, SOPs, decision frameworks.
The Reading Room — book syntheses that pull the core ideas from 400 pages into something you can act on.
Operator Interviews — conversations with practitioners who’ve built things, survived downturns, and made decisions with real money on the line. (Coming 2026)
Who writes this
I’m Karl. I co-run a construction company in the UK. Before that, I served in the Royal Marines.
The military taught me that plans are worthless the moment reality hits. What matters is how fast you adapt. Construction teaches me the same lesson every week — except now the consequences show up on a balance sheet.
I write The School of Knowledge because I need these frameworks as much as anyone. Everything published here started as something I built to solve my own problems. Skin in the game isn’t a tagline — it’s the standard.
Start here
If you’re new, these are the best places to begin:
The Rumsfeld Matrix — a simple, powerful tool for making decisions under uncertainty
How to Read an Income Statement — the financial literacy every business owner needs
An Introduction to Capital Allocation — why it’s the most important decision a business owner makes
Go deeper
Two years of material, organised by theme:
Capital allocation & investing — deep research on businesses, operators, and how the best allocators think
Business fundamentals — operating manuals for the unsexy stuff that keeps companies alive
Books & research — the core ideas from 400-page books, distilled into something you can act on
Tools & templates — calculators, checklists, and frameworks ready to use
Want the implementation layer?
Free subscribers get The Weekly every Sunday. Paid members get the deeper piece every Saturday — the case study, checklist, or operating manual that turns that week’s idea into something you can act on by Monday.
The same tools I use to allocate capital and stress-test decisions in my own business. Not theory. Not motivation dressed up as strategy. Just the tools, clearly explained, ready to use.
One good decision pays for a year’s membership many times over.
£15/month. Less than a single business book. Cancel any time.
Not sure yet? Start free, read a few issues, and decide when you’re ready.
See you inside.
Karl