Lesson Plan

• Describe the concept of electric charge and its properties.
• Explain that the SI unit of charge is the coulomb and relate it to current and time.
• Apply the formula Q = I × t to calculate charge in given situations.
• Convert between coulombs and the number of elementary charges.
• Identify the relationship between charge, current, and time in circuit diagrams.

• Whiteboard and markers
• Projector or interactive display
• Printed worksheet with example problem
• Calculator
• Diagram of a simple circuit (digital or printed)
• PowerPoint slides summarising key formulas

Begin with a quick demonstration: rub a balloon on hair and observe the static attraction, prompting the question “What causes this force?”. Recall that electric charge is a property of matter that can be positive or negative. Today we will determine how this charge is quantified, aiming to state that its unit is the coulomb.

1. Do‑now (5'): Students answer a short question on static electricity in their notebooks; teacher checks responses.
2. Mini‑lecture (10'): Define electric charge, introduce the coulomb, and present Q = I × t with examples.
3. Guided practice (12'): Work through the example problem (2.5 A for 8 s) together, using the formula.
4. Interactive activity (10'): Students use calculators to convert a given charge into number of electrons and vice‑versa, discussing results.
5. Check for understanding (8'): Quick quiz (exit ticket) with two questions: state the unit of charge and write the formula.

Summarise that charge is measured in coulombs, linking current and time through Q = I t. For the exit ticket, pupils write the unit and a real‑world example of charge transfer. Homework: complete a worksheet calculating charge for various current‑time scenarios.