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GCSE OCR

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J277 Unit 2: Data representation

Specification J277 from 2020 - Paper 1

Unplugged Unit
Perfect for lessons away from computers or workshops.
2

Inside the Unit...

Download Free Sample 4.1mb

Areas Covered

  • Lesson 1 Units of data storage and binary numbers
  • Lesson 2 Binary arithmetic and hexadecimal
  • Lesson 3 Characters
  • Lesson 4 Images
  • Download free lesson above
  • Lesson 5 Sound
  • Lesson 6 Compression
  • Lesson 7 Assessment

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

Summary

This unit is subdivided into six topics spread across six lessons, plus a test, in order to fit with most school timetables. Each comprehensive lesson contains a worksheet to be done in class to consolidate students’ knowledge and understanding, as well as a homework sheet to give them plenty of practice in answering exam-style questions. The conversion of integers from denary to binary is covered in the first lessons, together with simple binary addition, overflow and shifts. In subsequent lessons, the use of hexadecimal numbers and the binary representation of characters is described. Representation of images and sound, and compression techniques are covered in three separate lessons. In the final lesson students sit an assessment test comprising questions similar to those found on the OCR exam paper.

What's included in the toolkit?

Toolkit

The GCSE units have been written to comprehensively satisfy the specification the OCR J277 Computing GCSE. Each unit delivers a complete solution comprising:

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

What people say...

“
”

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

“
”

I’m so impressed with the OCR Computer Science books that’s all I now teach from. We have purchased all our students the revision booklet and the exam one!

Rob Frain. Computer Science Teacher, Lathom High School

Relevant Textbooks

Inside the Unit...

  • Download Free Sample 4.1mb

    Areas Covered

    • Lesson 1 Units of data storage and binary numbers
    • Lesson 2 Binary arithmetic and hexadecimal
    • Lesson 3 Characters
    • Lesson 4 Images
    • Download free lesson above
    • Lesson 5 Sound
    • Lesson 6 Compression
    • Lesson 7 Assessment

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

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