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Read the cookie detailsOCR GCSE Computer Science
Understand the theory with clear lessons, practise Python in your browser and test what you know for both OCR papers.
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See a free lesson firstThe specification, connected
Students do not simply read definitions. They use diagrams, calculations, code, scenarios and exam responses to connect ideas across the course.
J277/01 · Computer systems
Includes number systems, data representation, calculations, topologies, threats, prevention and scenario-based evaluation.
J277/02 · Computational thinking, algorithms and programming
Students move between written algorithms, flowcharts, trace tables, Python and OCR Exam Reference Language.
A genuine programming curriculum
Predict, trace and change short programs before writing independently.
Make decisions, validate input, repeat processes and test boundaries.
Search, sort, process characters and work with structured records.
Build modular, robust programs using persistent data and larger projects.
Explicit explanation, examples, retrieval and supported activities introduce each concept.
Varied challenges and open projects build fluency.
Spaced retrieval, Focus, Mistakes and Exam Coach prepare students for both papers.
Short checks, revision sessions and saved attempts show what to revisit next.
The individual trial opens every published theory and programming lesson plus the complete Guide, Revision and Practice areas.