Lesson Plan

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Lesson Plan
Grade: Date: 25/02/2026
Subject: Biology
Lesson Topic: define resolution and magnification and explain the differences between these terms, with reference to light microscopy and electron microscopy
Learning Objective/s:
  • Define resolution and magnification in the context of microscopy.
  • Compare how resolution and magnification differ between light and electron microscopes.
  • Explain why increasing magnification does not always improve visible detail.
  • Select the appropriate microscope type for a given cellular structure based on resolution limits.
  • Interpret a comparative diagram of microscope resolving power.
Materials Needed:
  • Projector or interactive whiteboard
  • PowerPoint slides with definitions and tables
  • Handout summarising formulas and key differences
  • Sample images from light and electron microscopes
  • Worksheets for guided practice
  • Rulers or digital measurement tools (optional)
 Introduction:
Begin with a quick image of a cell viewed under two microscopes to spark curiosity. Recall students’ prior knowledge of basic microscope parts and the concept of magnification. State that by the end of the lesson they will be able to define resolution and magnification, distinguish the two, and choose the suitable microscope for a given feature.
Lesson Structure:
  1. Do‑Now (5’) – Students label a simple diagram with the terms magnification and resolution.
  2. Mini‑lecture (10’) – Present definitions, formulas, and the core differences between the concepts.
  3. Comparative table analysis (8’) – Groups examine the provided table and discuss why electron microscopes achieve higher resolution.
  4. Guided practice (10’) – Worksheet where learners match cellular structures to the appropriate microscope based on size.
  5. Class discussion (5’) – Share answers, clarify misconceptions about “empty magnification.”
  6. Exit ticket (2’) – Write one sentence explaining the key difference between magnification and resolution.
Conclusion:
Summarise that magnification describes image size while resolution determines the smallest detail visible. Collect exit tickets as a quick check for understanding. Assign a short homework: research a real‑world application where electron microscopy was essential.