Lesson Plan

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Lesson Plan
Grade: Date: 17/01/2026
Subject: Physics
Lesson Topic: Recall and use the equation for wave speed v = f λ
Learning Objective/s:
  • Describe the relationship between wave speed, frequency and wavelength.
  • Apply the equation v = f λ to calculate any one of the three variables.
  • Interpret wave‑property tables and diagrams to identify amplitude, wavelength and period.
  • Check calculations for correct units and significant figures.
Materials Needed:
  • Projector or interactive whiteboard
  • Printed worksheet with wave terminology table and practice questions
  • Calculators (one per pair)
  • Rulers or measuring tapes for hands‑on demo
  • Speaker or tone generator (optional sound‑wave demo)
  • Exit‑ticket slips
 Introduction:
Begin with a quick question: “What do you notice about the pitch of a musical note when you tighten a guitar string?” Connect this to prior knowledge of frequency and wavelength. State that today students will master the core equation v = f λ and be able to solve for any variable, which will be the success criteria for the lesson.
Lesson Structure:
  1. Do‑now (5'): Students answer a short quiz on amplitude, frequency and wavelength on the board.
  2. Mini‑lecture (10'): Review wave properties, introduce v = f λ, and show the diagram of a transverse wave.
  3. Guided example (10'): Work through the provided sound‑wave problem step‑by‑step, emphasizing unit consistency.
  4. Partner practice (15'): Students complete three practice questions from the worksheet, checking each other’s work.
  5. Formative check (5'): Quick “thumbs up/down” poll on who can correctly rearrange the equation for each variable.
  6. Summary & reflection (5'): Recap key points and answer any lingering questions.
Conclusion:
Recap the link between speed, frequency and wavelength and remind students to always keep units consistent. Collect exit‑ticket slips where each pupil writes one example of using the equation in a different context. For homework, assign three additional problems requiring rearrangement of v = f λ.