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schoolOCR Computer Science · GCSE (J277) & A Level (H446)

Computer Science, taught, tested, tracked.

Theory notes, real exam-format questions with mark schemes, and a map of every specification point you’ve proved you know. Helping you get that Grade 9/A*.

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Every unit of both specs, taught properly

Notes written for the mark scheme, not around it — tagged to OCR’s own spec references, from 1.1 to the end of the course.

history_eduPractise

Real questions. Real mark schemes.

OCR-style papers with marks you can check yourself against — no guessing what the examiner might want.

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Ten minutes a day moves your grade

Spec-tagged retrieval drills that find your weak spots and keep them warm — built for long-term success, not just tomorrow.

OCR GCSE (9–1) · J277/01SECTION A

1 (a) Describe the purpose of the Memory Address Register (MAR). [2]

MARK SCHEME Holds the address of the memory location (1) … that is about to be read from or written to (1)

GENERATED IN TRUE OCR LAYOUT — FLOWCHARTS, CODE AND ALL

Know exactly where you stand.

The Spec Map lights up every point you’ve proved — spend your revision time in the most impactful way.

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Both papers, both specsGCSE J277 and A Level H446, covered unit by unit in OCR’s own numbering.
Marks you can proveEvery question comes with its mark scheme, so you mark like an examiner.
Tracked to the spec pointProgress isn’t a feeling — it’s a map of exactly what you know.
fact_checkProof first

Try a question before you sign up

Every question follows exam-style layout — command words, mark allocations, the lot — with the mark scheme right there to check yourself against.

OCR GCSE (9–1) · J277/011.3 NETWORKS

3 (a) A school network uses a star topology. Explain one advantage of a star topology compared with a bus topology. [2]

MARK SCHEME If one cable or link fails, only that device is affected (1) … whereas in a bus topology a break in the main cable stops the whole network (1)
swordsPractise

Two ways to turn revision into marks

Long-form exam technique when you’re working deep; quick-fire recall when you’ve got ten minutes spare.

Exam Question Generator

Multi-part questions in true OCR layout — flowcharts, code, data tables — each with its mark scheme, and printable as a full paper.

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Quick-Fire Training

Spec-tagged retrieval drills that adapt to what you keep getting wrong, plus a Past Paper Simulator for the real thing.

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terminalPyBootcamp

The programming paper is half your grade. Practise like it.

PyBootcamp runs Python in your browser — nothing to install — and drills the exact techniques J277 and H446 expect you to read, trace and write under exam conditions.

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NOT SEEN SEEN SHAKY PROVED STRONG
mapSpec Map

Know exactly where you stand

Every spec point you attempt is tracked — from not seen, through seen and shaky, to proved and strong. Revision time goes where the marks are. And when you want a change of pace, there’s XP, streaks, badges and a leaderboard — the game layer is optional, the marks aren’t.

See the Spec Map
schoolFor teachers & parents

Accurate to the specification, safe to recommend

Computing Survivor is written against the OCR J277 and H446 specifications point by point — a revision tool first, everything else second.

Spec-referenced content

Notes, questions and drills are tagged to individual spec points, in OCR’s own numbering.

Classroom-ready resources

A teacher whiteboard, printable questions and worksheets you can drop straight into a lesson.

Free to start

Pupils can learn, practise and track progress without paying a penny.

Open the gateway.

Two specifications, taught separately. Pick yours — the whole site follows it from here.

GCSE Computer Science OCR J277 · Years 9–11 A Level Computer Science OCR H446 · Years 12–13