Lesson Plan

• Describe the composition and origin of bile.
• Explain how bile emulsifies fats and forms micelles.
• Illustrate the step‑by‑step role of bile in fat digestion.
• Evaluate the importance of bile for absorption of fatty acids and monoglycerides.

• Projector or interactive whiteboard
• Slides/PowerPoint on bile and fat digestion
• Handout with summary table and diagram
• Model of the digestive system or digital animation
• Worksheet with short questions
• Whiteboard markers

Start with a quick question: “What happens to the greasy pizza you ate last night?” Connect this to prior learning about enzymes breaking down carbohydrates and proteins, reminding students that fats need extra assistance. Explain that by the end of the lesson they will be able to describe bile’s function and trace its role in fat digestion.

1. Do‑now (5') – Short quiz on macronutrient digestion to activate prior knowledge.
2. Mini‑lecture (10') – Introduce bile: production in the liver, storage in the gallbladder, composition and basic function, using slides.
3. Demonstration (8') – Emulsification experiment with oil and dish soap to visualise droplet size reduction.
4. Guided activity (12') – Pairs label a five‑step flowchart of fat digestion, discussing bile’s role at each stage.
5. Whole‑class discussion (8') – Review chart answers, clarify micelle formation and absorption.
6. Check for understanding (5') – Exit ticket: write one sentence describing how bile assists pancreatic lipase.

Summarise how bile emulsifies fat, creates micelles and enables efficient lipase activity and absorption. Collect the exit tickets to gauge understanding, and remind students to review the handout diagram at home. Homework: complete a worksheet that asks them to diagram the fat‑digestion process and label bile’s contributions.