Compression KS3 Resources

KS3 Computer Science: Compression

This module contains:

  • An editable PowerPoint lesson presentation
  • Editable revision handouts
  • A glossary which covers the key terminologies of the module
  • Topic mindmaps for visualising the key concepts
  • Printable flashcards to help students engage active recall
  • A quiz with answer key to test knowledge and understanding of the module
Compatible with the following examination boards
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File handling is one of the primary functions of a computer system. Based on the type of data that needs to be stored, several types of file formats are available. Each file format occupies certain storage space. An image file with good quality occupies around 1 MB, and an uncompressed 1-minute audio file occupies around 11 MB. A CD will be able to occupy approximately 77 minutes of this audio. Compression methods are used to reduce the size of the files.
Compression is also helpful in reducing the download time of an image, audio and video from the internet.

This KS3 Computer Science module introduces compression to your students, explaining:

  • Why compressing files is important
  • How text, image, and audio files compressed
  • Effects of compressing a file
  • What are the various file formats
  • Streaming audio files
  • Compression algorithms

More Data Representation Modules

Compression is one lesson in our Data Representation module. The other theory lessons can be found below: