Lesson Plan

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Lesson Plan
Grade: Date: 17/01/2026
Subject: Mathematics
Lesson Topic: Mensuration: perimeter, area, surface area, volume
Learning Objective/s:
  • Calculate perimeter of common plane figures using appropriate formulas.
  • Determine area of plane shapes and surface area of solids accurately.
  • Compute volume of three‑dimensional figures and apply unit conversion.
  • Select and apply the correct formula for a given shape in exam‑style problems.
  • Check solutions for reasonableness and correct significant figures.
Materials Needed:
  • Projector and screen
  • Whiteboard and markers
  • Ruler and geometry set
  • Printed worksheet with formulas and practice items
  • Scientific calculators
  • Prepared diagram slides (rectangle, cylinder, etc.)
  • Exit‑ticket slips
 Introduction:
Begin with a real‑world hook asking how much paint is needed to cover a cylindrical tank. Review prior learning of basic perimeter and area formulas. State the success criteria: correctly choose and use formulas for perimeter, area, surface area and volume, and present answers with correct units.
Lesson Structure:
  1. Do‑now (5'): Quick perimeter worksheet on the board.
  2. Mini‑lecture (10'): Review key formulas with projected diagrams of each shape.
  3. Guided practice (15'): Paired work on area and surface‑area examples from the worksheet; teacher models one problem.
  4. Worked example (10'): Teacher solves the cylinder surface‑area and volume problem while students follow on their notebooks.
  5. Independent practice (15'): Mixed problems covering perimeter, area, surface area and volume; teacher circulates for support.
  6. Quick revision checklist (5'): Students complete the checklist to ensure they have identified shape, written formula, substituted values, shown steps, and recorded units.
  7. Exit ticket (5'): One mensuration problem to solve and a brief reflection on the lesson’s success criteria.
Conclusion:
Recap the main formulas and emphasise the importance of units and significant figures. Collect exit tickets to gauge understanding and assign homework: complete the textbook exercises on mensuration, focusing on conversion and accuracy.