Lesson Plan

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Lesson Plan
Grade: Date: 25/02/2026
Subject: Physics
Lesson Topic: Circuit diagram symbols and analysis
Learning Objective/s:
  • Draw accurate circuit diagrams using standard symbols for cells, batteries, power supplies, generators, potential dividers, switches, resistors (fixed & variable), heaters, NTC thermistors, LDRs, lamps, motors, bells, and ammeters.
  • Interpret a given diagram to identify each component’s function and predict overall circuit behaviour (current, voltage, power).
  • Apply series‑parallel analysis to calculate currents, voltages and power in circuits containing the listed components.
  • Explain how specific characteristics (temperature‑dependent thermistors, light‑dependent LDRs, back‑EMF of motors) influence circuit operation.
Materials Needed:
  • Projector or interactive whiteboard for symbol slides
  • Printed worksheet with circuit‑diagram exercises
  • Set of physical components (batteries, switches, fixed & variable resistors, lamp, motor, ammeter, voltmeter)
  • Solderless breadboard and connecting wires for live demonstration
  • Adjustable DC power supply
  • Markers and large paper for student sketching
 Introduction:
Begin with a quick demonstration of a simple series circuit lighting a lamp to capture interest. Review students’ prior knowledge of voltage, current and Ohm’s law. Explain that by the end of the lesson they will be able to draw correct circuit diagrams using standard symbols and predict how the circuit will behave.
Lesson Structure:
  1. Do‑now (5') – short quiz on common circuit symbols.
  2. Direct instruction (10') – presenter slides covering each symbol and its electrical behaviour.
  3. Guided practice (15') – teacher models drawing a circuit; students annotate the diagram.
  4. Group activity (20') – pairs draw a given circuit and calculate currents/voltages using series‑parallel rules.
  5. Check for understanding (5') – quick oral questioning with clicker responses.
  6. Worked example (10') – step‑by‑step solution of the 12 V battery example.
  7. Summary & exit ticket (5') – students sketch a new diagram and state the expected current.
Conclusion:
Summarise that accurate symbols and series‑parallel analysis are essential for interpreting circuits. Collect exit tickets where students sketch a circuit and predict its current. For homework, assign a worksheet containing five new circuit diagrams to draw and analyse.