CS Unplugged: Field guide: Data Representation

An online resource for teaching Computer Science to students, this chapter focuses on Data Representation. This chapter is about some of the different methods that computers use to code different kinds of information in patterns of bits, and how this affects the cost and quality of what we do on the computer.

Additional details

Year band(s) 7-8, 9-10
Format Web page
Core and overarching concepts Data representation
Australian Curriculum Digital Technologies code(s)

Investigate how digital systems represent text, image and audio data using integers


Explain how and why digital systems represent integers in binary


Analyse and visualise data using a range of software, including spreadsheets and databases, to draw conclusions and make predictions by identifying trends


Represent documents online as content (text), structure (markup) and presentation (styling) and explain why such representations are important


Investigate simple data compression techniques


Develop techniques to acquire, store and validate data from a range of sources using software, including spreadsheets and databases

Keywords Data Representation, Data visualisation, Data collection, Binary, Hexadecimal, Byte, Unicode, Colours, RGB Colour Mixer, CMY Colour Mixer

University of Canterbury, New Zealand


University of Canterbury, New Zealand. Creative Commons BY-NC-SA 4.0.