Lesson Plan

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Lesson Plan
Grade: Date: 25/02/2026
Subject: Physics
Lesson Topic: State the differences between the properties of temporary magnets (made of soft iron) and the properties of permanent magnets (made of steel)
Learning Objective/s:
  • Describe the key differences in material composition and magnetic properties between temporary (soft iron) and permanent (steel) magnets.
  • Explain how magnetic domains, coercivity and retentivity determine whether a magnet is temporary or permanent.
  • Compare typical field strengths, retention times, and common applications of each type of magnet.
Materials Needed:
  • Soft‑iron rod and steel rod (sample pieces)
  • Electromagnet or strong bar magnet for induction
  • Compass or gaussmeter
  • Whiteboard and projector
  • Student worksheet with comparison table
 Introduction:
Begin with a quick demonstration: bring a steel paperclip close to a piece of soft iron and observe the attraction only while the electromagnet is powered. Ask students what they already know about magnets and how some retain magnetism after the field is removed. Explain that today they will identify the properties that distinguish temporary from permanent magnets and how these affect real‑world uses.
Lesson Structure:
  1. Do‑now (5'): Students list everyday examples of magnets on a sticky note.
  2. Mini‑lecture (10'): Explain magnetic domains, coercivity and retentivity using a projected diagram.
  3. Demonstration (10'): Show soft‑iron magnetised by an electromagnet and steel retaining magnetism; record observations.
  4. Guided inquiry (15'): Students complete a comparison table in their worksheet, discussing each property.
  5. Concept check (5'): Quick quiz (Kahoot or show of hands) on key differences.
  6. Summary discussion (5'): Review answers, clarify misconceptions, and link to real‑world applications.
Conclusion:
Recap the main distinctions between temporary and permanent magnets, emphasizing domain behavior and practical applications. Students complete an exit ticket stating one real‑world use for each type of magnet. For homework, assign a short research task to find an everyday device that relies on a permanent magnet and explain why.