Unit plan: Image Representation

What's it all about?

Preparatory knowledge

Students should have completed Lesson 1 (for the relevant age group) of the Binary Numbers unit before beginning this unit.

Images are everywhere on computers and other digital devices. If you think of all the different devices you use, and what you do with them, it is likely that almost all of these will involve a screen or display of some kind! Everything you see on computer screens, whether it is photographs, videos, websites, even text, is an image that a digital device has been programmed to display. Because computers store data as digits, computer images are ultimately represented inside a computer using just 0's and 1's.

Terminology note

In this unit and its lesson plans the word image is used to refer to what is displayed on a computer screen or display at any time. It includes everything seen on a screen, such as videos, websites, apps, …

Read the full unit plan description


Ages 5 to 7 Programming challenges
In the teacher observations sections there may also be background notes on the big picture. There is no expectation that 5 to 7 year olds will need to know this, but if you are asked, you have the answer at your fingertips.
1 Colour by numbers No
Ages 8 to 10 Programming challenges
1 Colour by numbers No