Lesson Plan

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Lesson Plan
Grade: Date: 17/01/2026
Subject: Economics
Lesson Topic: definition of price elasticity of supply (PES)
Learning Objective/s:
  • Define price elasticity of supply (PES) and write its formula.
  • Classify supply elasticity (elastic, unit‑elastic, inelastic, perfectly inelastic, perfectly elastic) using PES values.
  • Identify the main factors that influence PES and explain their effect.
  • Interpret a PES coefficient to predict how producers will respond to price changes.
  • Apply PES concepts to solve a short calculation problem.
Materials Needed:
  • Projector or interactive whiteboard
  • Slide deck with definition, formula, and classification table
  • Printed worksheet with PES calculation exercises
  • Graph paper or digital graphing tool
  • Sample price‑quantity data set
  • Exit‑ticket cards
 Introduction:
Begin with a quick question: “If the price of a popular smartphone drops, what might happen to the amount manufacturers supply?” Collect a few responses, link them to prior knowledge of supply, and outline that today students will be able to define and calculate PES and use it to predict producer behavior.
Lesson Structure:
  1. Do‑now (5’) – Students write a brief prediction about price‑quantity changes; share aloud.
  2. Direct instruction (10’) – Present the PES definition, formula, and interpretation using slides and the classification table.
  3. Guided practice (12’) – Work through a sample calculation of PES with provided data; discuss the resulting elasticity category.
  4. Factors discussion (8’) – Small‑group analysis of time, input availability, production flexibility, and storage; groups report key insights.
  5. Graphing activity (10’) – Students sketch supply curves for each elasticity type on graph paper or a digital tool.
  6. Check for understanding (5’) – Quick quiz (Kahoot or exit‑ticket) where learners identify elasticity type from a given coefficient.
  7. Summary & homework (5’) – Recap main points and assign a problem set requiring PES calculations for different scenarios.
Conclusion:
Review the definition, formula, and classification of PES, highlighting how the factors discussed shape elasticity. Ask students to write one “exit ticket” sentence summarizing why understanding PES matters for producers. Assign homework problems that reinforce calculating and interpreting PES in real‑world contexts.