# IGCSE

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## Unit 1: Data representation

### Syllabus 0478 / 0984 & O Level 2210

Unplugged Unit
Perfect for lessons away from computers or workshops.
1

## Inside the Unit...

### Areas Covered

• Lesson 1 Binary Systems
• Lesson 2 Hexadecimal
• Lesson 3 Storing text in ASCII
• Lesson 4 Representation of images
• Lesson 5 Representation of sound
• Lesson 6 Data compression
• Lesson 7 Assessment

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

## Summary - 2019 Edition

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 Cambridge IGCSE® 0478 / 0984 and O Level 2210 Computer Science specification. The conversion of integers from denary to binary is covered in the first lesson, together with the use of binary in computer registers. In the second and third lessons, the use of hexadecimal numbers and the binary representation of characters 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 and lossless compression techniques used for images, sound, video and text. In the final lesson students sit an assessment test comprising questions similar to those found on the IGCSE exam paper.

## What's included in the toolkit?

These units have been written to satisfy the specification for the theoretical Section 1 of the Cambridge IGCSE® 0478, 0984 and O Level 2210 Computer Science courses. Each unit 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...

Your resources are head and shoulders above the rest.

Kieren Reynolds. CAS Master teacher and teacher, Henry Beaufort School

I get offered probably every IGCSE, OCR and AQA resource pack out there and have seen most. I can tell you without doubt yours are the best. Your resources are head and shoulders above the rest.

Kieren Reynolds. CAS Master teacher and teacher, Henry Beaufort School

## Inside the Unit...

### Areas Covered

• Lesson 1 Binary Systems
• Lesson 2 Hexadecimal
• Lesson 3 Storing text in ASCII
• Lesson 4 Representation of images
• Lesson 5 Representation of sound
• Lesson 6 Data 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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