Learning objective
- To explain how the data for digital images can be compressed.
Success criteria
- I recall that images are made of pixels.
- I
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National curriculum
Computing
Pupils should be taught to:
- Understand
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Cross-curricular links
None.
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Before the lesson
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Lesson plan
1: Lesson plan
An area for you to put useful resources from the previous lesson
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Adaptive teaching
Pupils needing extra support:
Could be provided with the mosaic with the fewest pieces for the Attention grabber activity; could use the Knowledge organiser to help them answer the questions throughout the lesson; could work with a partner to save three different versions of an image.
Pupils working at greater depth:
Should use Excel to help them calculate exactly how many bits there are in each version of the image; could be challenged to find a way to download a bitmap directly from the internet using the ‘advanced Search’ dropdown within Google and select File Type = BMP (the children will probably not find a BMP they like but explain that they are rare to download because of their massive file size and JPEG is the standard).
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Assessing progress and understanding
Pupils with secure understanding indicated by: saving JPEG as a bitmap; recognising
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Vocabulary definitions
-
compression
Taking single or multiple files and reducing their file size to take up less digital storage space.
-
data
Information used for a specific purpose or investigation.
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In this unit
Maintained by: Kapow Primary team
Last update: 18th June, 2024
