| Lesson Plan |
| Grade: |
Date: 25/02/2026 |
| Subject: Physics |
| Lesson Topic: State that positive charges repel other positive charges, negative charges repel other negative charges, but positive charges attract negative charges |
Learning Objective/s:
- Describe the behavior of electric charges: like charges repel and opposite charges attract.
- Explain Coulomb’s law and predict how the force changes when the separation distance changes.
- Identify charge interactions using a summary table of charge pairs.
- Predict the outcome of simple charge demonstrations and justify using the concepts learned.
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Materials Needed:
- Projector and screen
- Whiteboard and markers
- Printed handout with the charge interaction table
- Charged balloons and a charged plastic rod for demonstrations
- Worksheet with Coulomb’s‑law problems
- Calculator for each pair of students
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Introduction:
Begin with a quick question: “What happens when you rub two balloons together and bring them close?” Connect this to prior knowledge that charge is a property of matter. Explain that today’s success criteria are to state how like and unlike charges interact and to use Coulomb’s law to explain force changes.
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Lesson Structure:
- Do‑Now (5’) – Think‑pair‑share on everyday static‑electricity examples.
- Mini‑lecture (10’) – Introduce charge types, repulsion/attraction, and display the summary table.
- Demonstration (10’) – Balloon‑balloon repulsion and rod‑electroscope attraction; students predict outcomes.
- Guided practice (12’) – Worksheet activity applying Coulomb’s law to varying distances.
- Check Understanding (8’) – Whole‑class discussion of the two “Check Your Understanding” questions.
- Exit ticket (5’) – Write one accurate statement about charge interactions.
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Conclusion:
Summarise that like charges repel, opposite charges attract, and the force follows Coulomb’s law. Collect exit tickets as a retrieval check and assign homework: complete additional problems on charge interactions and force calculations.
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