Break the problem. Build the solution.
GCSE Computer Science
revision.
Computer Science rewards students who can decompose a problem, dry-run it on paper, and then explain the machine underneath. These guides start with the idea you can retrieve in an exam, then pin it to a worked trace, a diagram or a precise definition the mark scheme actually uses.
Algorithms and programming
Algorithms and programming
made memorable.
Computational thinking, core constructs, and the logic that sits under every IF and WHILE.
All Algorithms and programming revisionAlgorithms
Decomposition, abstraction, searching, sorting, and how to prove an algorithm works with a trace table.
Start revising 02Programming basics
Sequence, selection, iteration, data types, strings, arrays, functions, validation and the three faces of errors.
Start revising 03Boolean logic
AND, OR and NOT gates, truth tables, and how to read a logic circuit the way the paper draws it.
Start revisingComputer systems and networks
Computer systems and networks
made memorable.
What the CPU actually does, and how machines share data without chaos.
All Computer systems and networks revisionData representation and security
Data representation and security
made memorable.
Binary, images, sound, and the threats that turn data into an incident.
All Data representation and security revisionBinary and data representation
From bits and overflow to hex, characters, images, sound and why compression has to throw information away — or not.
Start revising 02Cyber security
How systems are actually attacked — malware, people and weak configuration — and the controls that make an attack expensive.
Start revisingBuilt for real revision
GCSE Computer Science,
without the waffle.
GCSE Computer Science revision for algorithms, programming, binary, networks, cyber security, systems architecture and Boolean logic — with trace tables, not hand-waving.
7 guides, each with a memory hook, precise knowledge, a worked example and a retrieval check. Use a page for a quick refresh before exam questions, or as the first step in a spaced revision session.