Close message Scootle has stopped supporting resources that use the Adobe Flash plug-in from 18 Dec 2020. Learning paths that include these resources will have alerts to notify teachers and students that one or more of the resources will be unavailable. Click here for more info.

# Digital technologies / Year 7 and 8 / Digital Technologies Knowledge and Understanding

Curriculum content descriptions

Investigate how digital systems represent text, image and audio data in binary (ACTDIK024)

Elaborations
• explaining that characters in text correspond to numbers defined by the character set, for example ‘A’ corresponds to 65 in the ASCII and Unicode character sets
• recognising that Unicode attempts to represent the written symbols of every language; and using Unicode charts to look up characters from Asian writing systems
• investigating the different representation of bitmap and vector graphics and its consequences, for example pixelation in magnified bitmap and vector images
• investigating how colours are represented in images and videos, for example manipulating red, green and blue (RGB) colours in an image editor
• converting between decimal and 8-bit (1 byte) unsigned binary, covering whole numbers typically used for characters and RGB, for example 65 in decimal is 01000001 in 8-bit binary
• explaining ways media elements are presented, for example the difference between embedded and linked media elements
General capabilities
• Critical and creative thinking Critical and creative thinking
• ICT capability Information and Communication Technology (ICT) capability
ScOT terms

Indices,  Data encoding,  Binary numeral system,  Computer files

## Refine by topic

Related topic * No suggestions

### Pixels and image quality

What are pixels and how do they work? Find out how pixels affect the quality of a digital image and learn how modern artists and designers can manipulate pixels in creative ways.

### Data Representation

Find out about Data Representation. Use this topic from the Digital Technologies Hub to learn more, get ideas about how to teach about it, find out what other schools are doing and use the applications and games in the classroom.

### What are pixels?

Meet Kevin Systrom and Piper Hanson as they explain how digital images work. What are pixels, those tiny dots of light, made from? How are colours created and represented? What does Kevin say about the way mathematical functions are used to create different image filters. What is the difference between image resolution ...

### Computers and binary

This is a unit for Year 8 from the Scope and sequence resources from the DT Hub. The topic of data representation is organised into four key elements. Use this flow of activities to plan and assess students against the relevant achievement standards. Students examine the ways all computer data including text, images and ...

### How computers compute

Watch as Jamie Teherani from MIT, demonstrates how a big, mechanical computer made from wood works. What does it have in common with the high-tech computers of today?

### Laptop wrap – colour by numbers

A page with a focus on binary and hexadecimal numbers and their relationship to colour displays. Contains supporting activities and links to resources.

### Binary

Find out about the binary number system, a base-2 number system. Use this topic from the Digital Technologies Hub to learn more, get ideas about how to teach about it, find out what other schools are doing and use the applications and games in the classroom.

### Everything is numbers!

In this sequence students learn how the binary number system works, how we can represent text using binary numbers and learn one of the representations of the standard English alphabet used by computers. They look at how the same concepts apply to non-text data and analyse the effectiveness of some binary representation ...

### The power of exponents

Have you heard of the term "exponential growth"? Growth can occur very quickly when powers are involved. See how you can use the power of two to rapidly increase the amount of anything from grain to coins!

### Digital Careers: Games designer and developer

Have you ever wanted to make a computer game? That's Kevin Chan's job. Kevin works at Robot Circus designing and developing computer games and apps. You can play one of Kevin's awesome award-winning games, QED, right here on ABC Splash! This video was produced to coincide with the 2014 Hour of Code event organised by code.org .

### What does it take to make a video game?

It can take many people and many years to create a video game. From project managers to developers, learn about the many different roles in the gaming industry. What kind of skills and knowledge do you think you'd need to be a video game developer or designer?

### The beauty of prime numbers

A prime number is a number that only has two factors: one and itself. Listen to Adam Spencer and Richard Glover discussing prime numbers. They cover how we define these numbers and how and why prime numbers are widely used in internet encryption.

### Rua kai (food storage pit)

This is a black and white photograph of a rua kai (food storage pit). The pit is dug into sloping ground, and the front is constructed from planks of wood, with a doorway in the centre. An unknown Mäori woman, well rugged up, sits on the earth roof of the pit, alongside a couple of small, dark pigs. Two whare (houses), ...

### Circus towers: square stacks

Work out how many acrobats are needed to form square-shaped human towers. Start by building a square tower with four acrobats: two acrobats in the base layer and two acrobats standing on their shoulders. Examine a table and graph of the total number of acrobats in the towers. Predict the number of acrobats needed to build ...

### My design: talking car: create own text

Design a talking car to present at show and tell. Create your car by selecting from a range of elements such as mood, size and colour. Choose a voice and background picture for your car. Decide on a name that suits your talking car. Add a note about your car. Watch the animation. You can change your design as many times ...

### My design: talking dinosaur: create own text

Design a talking dinosaur to present at show and tell. Create your dinosaur by selecting from a range of elements such as mood, size and colour. Choose a voice and background picture for your dinosaur. Decide on a name that suits your talking dinosaur. Add a note about your dinosaur. Watch the animation. You can change ...

### My design: talking cat: choose text

Design a talking cat to present at show and tell. Create your cat by selecting from a range of elements such as mood, size and colour. Choose a voice and background picture for your cat. Decide on a name that suits your talking cat. Select a note about your cat. Watch the animation. Change your design as many times as you ...

### Secondary mathematics: using real data

These seven learning activities, which focus on the use of 'real data' using a variety of tools (software) and devices (hardware), illustrate the ways in which content, pedagogy and technology can be successfully and effectively integrated in order to promote learning. In the activities, teachers use the three content strands ...

### Fascinating prime numbers

Use this teaching resource to investigate prime numbers with your students. Go back in time to the ancient Greeks (around 300 BC) to find out how Euclid demonstrated that there is an infinite number of primes. Investigate ways to identify prime numbers using algebra and square numbers and how to represent large primes using ...

### Understanding exponents: 2

This resource is a short video presentation, with audio commentary, in which the meaning of exponents or powers of a number is explained. In the numerical example used the presenter explains the difference between evaluating the power of a number and the product of two numbers.