Lesson Plan

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Lesson Plan
Grade: Date: 25/02/2026
Subject: Chemistry
Lesson Topic: Name the uses of the fractions as: (a) refinery gas fraction for gas used in heating and cooking (b) gasoline/petrol fraction for fuel used in cars (c) naphtha fraction as a chemical feedstock (d) kerosene/paraffin fraction for jet fuel (e) diesel oi
Learning Objective/s:
  • Describe the main petroleum fractions and their typical boiling‑point ranges.
  • Explain the primary uses of refinery gas, gasoline, naphtha, kerosene, and diesel.
  • Compare how hydrocarbon composition influences the end‑use of each fraction.
  • Apply knowledge to match a given fraction with its correct application.
Materials Needed:
  • Projector and screen
  • Printed handout with fraction table
  • Whiteboard and markers
  • Images of fuel containers (gas can, diesel drum, etc.)
  • Matching activity worksheet
  • Exit‑ticket cards
 Introduction:
Begin with the question “What fuels power the devices we use every day?” Students recall common fuels and note they all derive from crude oil. The teacher states that by the end of the lesson they will be able to name each major fraction and its specific use, setting clear success criteria.
Lesson Structure:
  1. Do‑now (5') – Students write everyday fuels on sticky notes and share quickly.
  2. Mini‑lecture (10') – Show a simplified distillation column, explain boiling‑point ranges and introduce the five key fractions.
  3. Guided analysis (12') – In pairs, use the handout to match each fraction to its main use; teacher circulates with probing questions.
  4. Whole‑class debrief (8') – Groups present matches; teacher clarifies misconceptions and highlights key points.
  5. Application activity (10') – Worksheet where students predict how changing a boiling‑point cut would affect product yields.
  6. Check for understanding (5') – Exit ticket: write one use for naphtha and one for diesel.
Conclusion:
Recap that each petroleum fraction has a distinct boiling range that determines its composition and end‑use. Students complete the exit ticket confirming one use for two fractions. For homework, assign a brief research task to find a real‑world product derived from naphtha.