Lesson Plan

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Lesson Plan
Grade: Date: 25/02/2026
Subject: Economics
Lesson Topic: Interpretation of the significance of the PES value: perfectly inelastic, inelastic, unitary, elastic, perfectly elastic
Learning Objective/s:
  • Describe the five categories of price elasticity of supply and their key characteristics.
  • Explain how to interpret a given PES value.
  • Analyse how factors such as time period and input availability affect supply elasticity.
  • Apply the concept of PES to predict the impact of policy changes on market equilibrium.
Materials Needed:
  • Projector or interactive whiteboard
  • Printed handout of the PES classification table
  • Worksheet with interpretation exercises
  • Graph paper or digital graphing tool
  • Markers / pens
 Introduction:
Begin with a quick poll: “If the price of strawberries doubled overnight, would farmers instantly double their harvest?” Discuss students’ intuitions and link to supply responsiveness. State that by the end of the lesson they will be able to identify and interpret the five PES categories and use them in real‑world scenarios.
Lesson Structure:
  1. Do‑now (5'): Students answer the poll question on sticky notes; teacher collects responses.
  2. Mini‑lecture (10'): Review the PES formula and introduce the five categories using the table.
  3. Guided practice (12'): Work through two examples, calculating PES and interpreting the results.
  4. Group activity (15'): Teams analyse a case study (e.g., electricity market) to determine the applicable PES category and present findings.
  5. Check for understanding (8'): Quick quiz via clickers/Kahoot matching values to categories.
Conclusion:
Summarise that PES tells us how quantity supplied reacts to price changes and that each category has distinct economic implications. Ask students to write one real‑world example of each PES type on an exit ticket. For homework, assign a short worksheet requiring calculation and interpretation of PES for three different goods.