Lesson Plan

• Describe the nature of positive and negative electric charges.
• Explain how like charges repel and opposite charges attract.
• Identify the symbols and typical particles associated with each charge type.
• Apply the concept of charge conservation to simple scenarios.
• Calculate the magnitude of charge using the elementary charge value.

• Projector and screen
• Whiteboard and markers
• Printed handout with charge table
• Static‑electricity demonstration set (balloon, hair or glass rod & silk)
• Worksheet with practice questions
• Diagram of charge interactions (attraction/repulsion)

Begin with a quick question: “What happens when you rub a balloon on your hair?” Connect this to prior knowledge about atoms and sub‑atomic particles. Explain that today’s success criteria are to state that electric charge exists in two types—positive and negative—and to predict how they interact.

1. Do‑now (5') – Students write down observations of static electricity in everyday life.
2. Mini‑lecture (10') – Introduce positive/negative charges, symbols, typical particles, and the unit coulomb using a projector and diagram.
3. Guided inquiry (10') – Examine the charge table, discuss repulsion/attraction, and check understanding with clicker questions.
4. Demonstration (5') – Balloon‑hair or glass‑rod‑silk experiment to visibly show charge type.
5. Practice activity (10') – Worksheet where students label charges, answer example questions, and apply charge conservation.
6. Summary & exit ticket (5') – Students write one concise statement about charge interactions on a sticky note before leaving.

Recap that electric charge comes in positive and negative forms, that like charges repel while opposite charges attract, and that charge is conserved. Collect the exit‑ticket statements and assign homework: complete the charge‑conservation worksheet and bring a real‑world example of static electricity to share next lesson.