This task can be used for formative assessment purposes or as a summative assessment to assess what students have learned as a result of investigating bitmap images, in particular the way in which binary digits are used to encode individual pixels of an image.
Provide students with the handout: Pixels and binary digits.
Use the handout: Pixels and binary digits to find out what students now about pixels and the way an image is coded using binary. Ask them to explain the relationship between the image and the grid that contains the 3 digit binary numbers.
To what extent:
To what extent:
Use the assessment checklist provided to record comments for each student.
The key active verbs used in the Australian Curriculum: Digital Technologies have been aligned to Bloom’s Revised Taxonomy.
In this task students explain and represent. The related Revised Blooms taxonomy are:
and
This assessment checklist provides a guide to record the student's demonstrated skills and knowledge.
Word and pdf versions of the checklist can be dowloaded in the resources section.
Demonstrated knowledge/skills | Yes/No or progressing | Comments |
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The student explains the way an image is encoded using binary data.
The bitmap image provided is used to explain how binary digits are combined to create a coloured pixel.
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The student can create their own bitmap image by encoding a grid using binary bit representation.
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