GCSE OCR

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Unit 8: Data representation

Specification J276 from 2016

 
8

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 Images
  • Download free sample below
  • 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

The unit is subdivided into six learning hours spread across six lessons, plus a test, in order to fit with most school timetables. It is a theoretical unit covering Section 2.6 of the latest OCR GCSE Computer Science specification. Each 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-type questions. The conversion of integers from denary to binary is covered in the first lessons, together with simple binary addition, overflow and shifts. Check digits are also covered by practical example. 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 satisfy the specification for the theoretical Component 2 Computational thinking, algorithms and programming of the new OCR J276 Computing GCSE. Each units contains:

  • 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...

Very helpful assessments, easy to assess and the resources are perfect for teaching. Thanks.

Seeven Soobaroyen. Springwood High School

PG Online resources are very well planned and easy to use. Inspection copies are also useful as this enables me to make better choices with our limited budgets.

Gillian Broadhead. ACTL Creative and Technical Studies, Ridgewood High School

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 Images
    • Download free sample below
    • 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.

    Download Free Sample 5.2mb

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