Lesson Plan

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Lesson Plan
Grade: 10 Date: 17/01/2026
Subject: Physics
Lesson Topic: Define the spring constant as force per unit extension; recall and use the equation k = F / x
Learning Objective/s:
  • Describe the meaning of the spring constant and its units.
  • Apply k = F / x to calculate the spring constant, force, or extension.
  • Solve multi‑step problems involving springs and identify common errors.
Materials Needed:
  • Spring set with varying stiffness
  • Masses and stand
  • Meter ruler or measuring tape
  • Digital scale (optional)
  • Whiteboard and markers
  • Projector with slides
  • Worksheet with practice questions
 Introduction:
Begin with a quick demonstration: attach a spring to a stand and hang a weight, asking students what they notice about the stretch. Recall previous work on force and units, linking to the new concept of stiffness. Explain that by the end of the lesson they will be able to determine the spring constant and use it to predict forces or extensions.
Lesson Structure:
  1. Do‑now (5'): Students answer a recall question on units of force and distance on the board.
  2. Teacher demonstration (7'): Show the spring‑mass setup, measure extension, calculate k live.
  3. Guided practice (10'): Work through the worked example together, rearranging the equation for each variable.
  4. Independent practice (12'): Students complete worksheet problems while the teacher circulates for misconceptions.
  5. Check for understanding (5'): Quick quiz (exit ticket) with one problem to solve using k = F / x.
  6. Summary discussion (5'): Review key points and address common mistakes.
Conclusion:
Summarise that the spring constant quantifies stiffness and is found by dividing force by extension. Ask a few students to share their exit‑ticket answers to reinforce the formula. Assign homework: three additional spring‑constant problems from the textbook. Remind them to bring a ruler for the next lab.