The method · A short manifesto

Why we teach it like this.

FIRST PRINCIPLES · I

scarcity

Scarcity is not poverty, nor is it shortage. It is the structural condition in which our wants exceed the means available to satisfy them. Every Edexcel B model begins with this observation, and most end by complicating it.

Fig. 04 · Scarcity · Theme 1.1

Most A-Level revision sites give you a wall of bullet points and a button that says "test yourself". The questions that motivated the topic in the first place — why a sugar tax raises £340m but doesn't fix obesity, why the Bank of England raises rates even into a supply shock — arrive, if they arrive at all, as a footnote in the back of the textbook.

Vofti starts at the other end. Each Edexcel B sub-chapter opens with a question built around something that actually happened: Thames Water's £19bn debt; the 2018 Sugar Tax; the 2022 tightening cycle. The diagram arrives only when it earns its way in.

"A model is a story short enough to remember in an exam, and useful enough to argue with in an essay."
— Vofti's editorial line.

Then we make you play with it. Every Edexcel B sub-chapter on Vofti has 15+ hand-written questions across MCQ, define, calc, apply, flaw and 12-mark essay chain. Submit a chain answer and the AI returns a numeric mark out of 12 plus a specific note on the single biggest area to improve.

Every answer feeds a private dossier. Topics you can do fade into the background. Topics you fumble surface again, in a slightly different shape, until they don't. By June you have a personal map of all four themes, and a much shorter list of things left to revise.

"A revision site that teaches the way a good teacher actually does."
— A teacher who reviewed the prototype.

None of this is novel. It is more or less how the subject is taught at its best — in the lessons of the half-dozen economics teachers in the country who are properly good at it. Vofti is the attempt to put that lesson, with its quizzes, its chains and its AI marker, on the open web. Free for any Edexcel B student who wants it.

— The Vofti team

K-A-A-E. The chain.

K
Knowledge. Define the key term. State the model. The examiner wants to see that you know what you're using before you use it.
A
Application. Take the model and aim it at the specific case in the extract. "In Thames Water's case…" not "in general…".
A
Analysis. Run the chain: cause → effect → effect. Two steps minimum. Each step has to earn the next.
E
Evaluation. Counter-argument, prioritisation, judgement. The mark you arrive at sits or falls here. Hedging is fine, abdicating is not.
Your dossier

KNOW YOUR GAPS.

Every quiz feeds a private syllabus tracker. Topics you ace fade. Topics you fumble surface. The dossier learns what you need.

SAMPLE — your dossier will look like this As of 2026.05 · Sample · Streak: 14 days
1.1 · Markets & demand
78%
1.2 · Elasticities
65%
1.5 · Market failure
41%
2.1 · Business growth
62%
2.6 · Macro policy
23%
3.1 · Globalisation
48%
3.3 · Exchange rates
35%
4.1 · Market structures
52%
4.3 · Labour markets
18%
4.4 · Govt intervention
31%
Streak · days practised
14d

Why trust this?

AI marker vs mark scheme
CALIBRATION RUN: in progress

We're running 50 past-paper essays through both Vofti's AI marker and the official Edexcel B mark scheme. Agreement rate posted by July 2026.

Question bank
440+

Hand-written items across MCQ, define, calc, apply, flaw, diagram and K-A-A-E chain. Anchored in real UK events from 2015–2025.

Cost
Free in beta

No card. No tracker. First 100 students who sign up are locked in at free for life — if Vofti ever introduces a paid tier, you won't be on it.