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OCR (KS4)

KS3 & KS4 computing curriculum

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Computer Science
Year 10

Data compression

6 lessons

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  • Data and information

Description

In this unit pupils will be introduced to the concept of data compression and why it is needed. The will compare lossy and lossless compression methods and their typical uses. They will have the opportunity to compression methods such as run length encoding (RLE) and Huffman coding.

At this stage, pupils are ready to think more critically about how digital information is managed in a world that depends on efficiency and communication. Understanding data compression helps them grasp the balance between quality, speed, and storage. Learning about how data is reduced and transmitted develops analytical thinking and decision-making, encouraging pupils to weigh trade-offs and justify choices. These skills extend beyond Computer Science, supporting logical reasoning and informed judgement across all areas of learning.

  1. Measurements of storage
  2. The need for compression
  3. Lossy and lossless compression
  4. Compression ratios
  5. Comparing compression algorithms
  6. Practical applications of compression
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