Computer Science

Computer Science — A Level

British Curriculum · Pearson · Years 12-13 · Ages 16-18

Pearson Edexcel International A Level Information Technology and the related computing routes are unit-based, combining written theory with substantial practical assessment in programming and systems development.

Content covers problem solving and programming, data structures and algorithms, computer systems and architecture, networks and the internet, databases and data modelling, and the legal, ethical and environmental impact of digital technology.

The practical components reward genuine development ability — designing, building, testing and documenting working software — rather than recall, so a steady project rhythm through the two years matters more than end-loaded revision.

Key topics covered

• Problem Solving & Programming — Decomposition, algorithm design, and implementing solutions in code.
• Data Structures & Algorithms — Arrays, lists, stacks, queues, trees, searching, sorting and efficiency.
• Computer Architecture — Processor design, memory hierarchy, storage and the fetch-execute cycle.
• Networks & the Internet — Topologies, protocols, transmission, security and web technologies.
• Databases & Data Modelling — Relational design, normalisation, SQL and data integrity.
• Systems Development — Requirements, design, implementation, testing and documentation.
• Impact & Ethics — Legal, ethical, privacy and environmental considerations in computing.