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It turns your syllabus into exam-style questions that pinpoint the exact misconception behind each mistake, then bring it back until it's fixed. Built for IGCSE, IB and A-Level science.

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Q3 · IB Biology · Photosynthesis

Which process occurs in the stroma of the chloroplast?

APhotolysis of water
BElectron transport chainyour answer
CAbsorption of light by chlorophyll
DCalvin cycle (carbon fixation)

Misconception

Confusing the light-dependent reactions (thylakoid) with carbon fixation (stroma).

Re-reading notes and highlighting feelproductive, but they hide the things you don't actually understand. You only find those gaps in the exam, when it's too late. PinPoint surfaces them now, one question at a time.

How it works

One idea at a time

Every question is a hinge question that tests a single concept, so you always know exactly what you got right or wrong.

It names your misconception

Each wrong answer maps to a specific, named misconception, so you see precisely where your thinking went off.

It corrects it on the spot

A short correction step targets the exact mistake you made, so every wrong answer actually teaches you something.

It repeats until it sticks

Spaced repetition brings each weak point back at the right moment, until every syllabus statement turns green.

Every wrong answer shows you what to fix

Get a question wrong and you find out the misconception behind it, not just what the right answer was.

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Correction step

The stroma is the fluid around the thylakoids. Light-dependent reactions happen in the thylakoid membrane; the Calvin cycle happens in the stroma.

Stroma → Calvin cycle
It is good for learning everything in the syllabus, especially the things that are often not covered during class- or only covered for a short amount of time.
IB Diploma Biology student

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Questions, answered

What is PinPoint?+

PinPoint is an adaptive revision platform for exam students. It turns each syllabus into thousands of exam-style multiple-choice questions, identifies the specific misconceptions behind your wrong answers, and uses spaced repetition to make sure every concept sticks.

Which exams does PinPoint cover?+

PinPoint currently covers Cambridge IGCSE Co-ordinated Sciences (0654), OxfordAQA International GCSE Combined Science (9204), IB Diploma Chemistry and Biology (first exams 2025), Singapore-Cambridge H2 Chemistry (9476) and Singapore-Cambridge O-Level Chemistry (6092), with more qualifications and boards on the way.

How is PinPoint different from flashcards or past papers?+

Flashcards test recall and past papers test a random sample. PinPoint covers every individual syllabus statement, and when you answer wrong it names the exact misconception behind your mistake and gives you a correction step to fix it, so every question teaches you something.

How much does PinPoint cost?+

PinPoint is completely free while in beta — no card required. A low-cost monthly subscription will be introduced later, but everything is free to use right now.

What is a hinge question?+

A hinge question tests one key concept with answer options that each map to a common misconception. Your answer reveals exactly what you misunderstand, which is what makes the feedback so precise.

Is my data safe?+

Yes. PinPoint is built with privacy by design: we collect the minimum data needed, you can export or delete your account at any time, and student data is protected with row-level security in the database.

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