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GCSE AQA

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8525 Unit 3: Fundamentals of data representation

Specification 8525 from 2020 - Paper 2

Unplugged Unit
Perfect for lessons away from computers or workshops.
3

Inside the Unit...

Download Free Sample 6.9mb

Areas Covered

  • Lesson 1 Units and binary numbers
  • Lesson 2 Binary arithmetic and hexadecimal
  • Lesson 3 ASCII and Unicode
  • Lesson 4 Representing images
  • Download sample lesson above
  • Lesson 5 Representing 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 8525. The conversion of integers from decimal to binary is covered in the first lesson, together with the binary addition of up to three numbers and binary shifts. In subsequent lessons, the use of hexadecimal numbers and character encoding is described. 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 8525 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

What people say...

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I have been using the OCR Computer Science A Level book which is a truly amazing resource and a must for Computer Science students. I have learnt a huge amount and feel the course would have been / be a struggle without it. 

Nigel White. Head of Computing, The Gryphon School

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Your materials are absolutely terrific.

Bill Robinson. Head of Computing, Gresham's School

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Inside the Unit...

  • Download Free Sample 6.9mb

    Areas Covered

    • Lesson 1 Units and binary numbers
    • Lesson 2 Binary arithmetic and hexadecimal
    • Lesson 3 ASCII and Unicode
    • Lesson 4 Representing images
    • Download sample lesson above
    • Lesson 5 Representing 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.

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