CS Unplugged: Image Representation - Colour by Numbers

Use the Colour by Numbers offline activity to explore how a B&W image is made up of pixels, shown as black or white dots which are represented by either a 1 or 0. Using a 0 or 1 to represent a white or black square students create an image on a grid. They supply the coded message for someone else to recreate. Support your teaching and learning with video clips and other related resources.

Additional details

Year band(s) F-2, 3-4, 5-6, 7-8
Format Web page
Core and overarching concepts Data representation
Keywords Data representation, Image Representation, Pixels, Binary
Integrated, cross-curriculum, special needs English

University of Canterbury, New Zealand


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