Lesson Plan

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Lesson Plan
Grade: Date: 17/01/2026
Subject: Computer Science
Lesson Topic: Justify the use of a bitmap image or a vector graphic for a given task
Learning Objective/s:
  • Describe the technical differences between bitmap and vector graphics.
  • Analyse task requirements to decide which image type is most appropriate.
  • Justify the selection of bitmap or vector format using criteria such as scalability, editing, and storage.
  • Apply the decision‑making process to real‑world examples (logo, photograph, map, sprite).
Materials Needed:
  • Projector or interactive whiteboard
  • Computer with image‑editing software (e.g., Photoshop, Illustrator, or free alternatives)
  • Sample bitmap and vector files (photos, logos, map graphics)
  • Printed worksheet with decision‑making checklist
  • Whiteboard markers and sticky notes
 Introduction:
Begin with a quick poll: which type of image do you think is best for a company logo? Review prior knowledge of pixels and vectors, then outline that by the end of the lesson students will be able to justify the appropriate format for any given visual task.
Lesson Structure:
  1. Do‑now (5’) – Students match sample images to “bitmap” or “vector” using sticky notes.
  2. Mini‑lecture (10’) – Review definitions, key differences, and the storage formulas for each format.
  3. Guided analysis (12’) – Teacher models the decision‑making criteria with Task A (company logo).
  4. Collaborative activity (15’) – Groups receive Tasks B‑D and complete a justification worksheet.
  5. Gallery walk & peer feedback (8’) – Groups display their justifications; peers comment using a checklist.
  6. Whole‑class debrief (5’) – Highlight common misconceptions and reinforce the criteria.
  7. Exit ticket (5’) – Students write a brief justification for a new scenario (e.g., an infographic icon).
Conclusion:
Summarise how scalability, editing ease, and storage constraints guide the choice between bitmap and vector graphics. Collect exit tickets as a quick retrieval check and assign homework: research an additional real‑world example and prepare a short justification for the chosen format.