Imagine drawing with zeros and ones. The third activity in a unit of 15 introduces the class to creating black and white images. Pairs get together to create an encoding scheme in order to make these images. They move on to a using a widget to encode their images before learning about the idea of metadata as it refers to the dimensions of the picture.

Concepts

computer science, binary code, pixels, computer code, technology resources

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Instructional Ideas

• For pupils that have a hard time with coding an image from scratch, have them create their image on graph paper first
• Have pupils share their bits with others to recreate their images by hand on graph paper

Classroom Considerations

• Review the tutorials in order to understand the coding and the use of the widget

Pros

• A video shows how to use the pixelation widget
• One of the extensions ties in compression with images

Cons

• None