Lesson Plan

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Lesson Plan
Grade: Date: 17/01/2026
Subject: Information Communication Technology ICT
Lesson Topic: Be able to resize an image as specified to maintain or adjust the aspect ratio of an image
Learning Objective/s:
  • Calculate the required height or width to maintain an image’s aspect ratio using proportional formulas.
  • Apply resizing tools in common software (Paint, Photoshop, GIMP) while keeping the ratio locked.
  • Identify situations that require changing the aspect ratio and choose appropriate methods (cropping vs. stretching).
  • Explain why preserving aspect ratio is essential for professional‑looking graphics.
  • Solve practical resizing problems presented in worksheets and real‑world scenarios.
Materials Needed:
  • Projector and screen
  • Computers with image‑editing software (Microsoft Paint, Adobe Photoshop, GIMP)
  • Sample digital images for resizing
  • Worksheet with resizing and aspect‑ratio problems
  • Calculator or spreadsheet for quick calculations
  • Whiteboard and markers
 Introduction:

Show a distorted image on the screen and ask students why it looks odd. Briefly recall the definition of aspect ratio and its role in preserving image shape. Explain that by the end of the lesson they will be able to resize images accurately and decide when to keep or change the ratio.
Lesson Structure:
  1. Do‑now (5'): Students examine a stretched image and note visual problems; quick class discussion.
  2. Mini‑lecture (10'): Define aspect ratio, why it matters, and present the width‑height formulas.
  3. Guided practice (15'): Teacher models calculating new height for a given width using a sample image; students follow on paper.
  4. Software demonstration (15'): Resize the same image in Paint and Photoshop, showing how to lock/unlock the ratio.
  5. Independent activity (15'): Students resize provided images on computers, record the new dimensions, and attempt a cropping task to change the ratio.
  6. Check for understanding (5'): Exit ticket – one resizing problem to solve and a brief justification.
Conclusion:

Recap the key steps for maintaining aspect ratio and the situations that call for cropping instead of stretching. Collect exit tickets to gauge understanding, and assign the worksheet with additional resizing scenarios as homework, asking students to bring a correctly resized image to the next class.