GCSE AQA

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Unit 3 Fundamentals of data representation

Specification 8520 from 2016

 
3

Inside the Unit...

Areas Covered

  • Lesson 1 Storage units and binary numbers
  • Lesson 2 Binary arithmetic and hexadecimal
  • Lesson 3 ASCII and Unicode
  • Lesson 4 Representating images
  • Download sample lesson below
  • Lesson 5 Representating sound
  • Lesson 6 Data compression
  • Lesson 7 Assessment

There are 6 worksheets, 6 homework tasks, and an examination-style assessment test, each with answers included in this unit.

Summary

The unit is subdivided into six learning hours plus an end-of-unit assessment spread across seven lessons in order to fit with most school timetables. It is a theoretical unit covering the latest AQA Computer Science specification 8520. The conversion of integers from denary to binary is covered in the first lesson, together with the binary addition of three numbers and binary shifts. In subsequent lessons, the use of hexadecimal numbers and character encoding is described with practical programming exercises to reinforce understanding. Representation of images and sound are covered in two separate lessons with a final lesson covering lossy compression techniques used for images, sound and video, and lossless techniques such as RLE and Huffman encoding. In the final lesson students sit an assessment test comprising questions similar to those found on the GCSE exam paper.   

What's included in the toolkit?

Toolkit

The GCSE units have been written to satisfy the specification for Paper 1 and Paper 2 of the AQA 8520 Computer Science GCSE. Each unit contains:

  • PowerPoint slides for each topic
  • Detailed lesson plans
  • Learning objectives and outcomes
  • Worksheets and homework activities with answers
  • End-of-unit, exam-style assessment test with answers
  • Other material and links to online resources

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Relevant Textbooks

Inside the Unit...

  • Areas Covered

    • Lesson 1 Storage units and binary numbers
    • Lesson 2 Binary arithmetic and hexadecimal
    • Lesson 3 ASCII and Unicode
    • Lesson 4 Representating images
    • Download sample lesson below
    • Lesson 5 Representating sound
    • Lesson 6 Data compression
    • Lesson 7 Assessment

    There are 6 worksheets, 6 homework tasks, and an examination-style assessment test, each with answers included in this unit.

    Download Free Sample 6.5mb

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