| Lesson Plan |
| Grade: |
Date: 25/02/2026 |
| Subject: Chemistry |
| Lesson Topic: Describe photosynthesis as the reaction between carbon dioxide and water to produce glucose and oxygen in the presence of chlorophyll and using energy from light |
Learning Objective/s:
- Describe the overall photosynthesis equation and the role of each reactant and product.
- Explain how chlorophyll absorbs light energy and drives the light‑dependent reactions.
- Outline the sequence of steps from light absorption to glucose formation (light reactions and Calvin cycle).
- Analyse the importance of photosynthesis for atmospheric CO₂ reduction and oxygen production.
- Apply knowledge by interpreting a leaf diagram showing chloroplast structures.
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Materials Needed:
- Projector or interactive whiteboard
- PowerPoint/slide deck with photosynthesis diagram
- Printed worksheet with reaction equation and flowchart
- Model of a leaf or chloroplast (optional)
- Colored markers and chart paper for group diagram
- Exit‑ticket cards
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Introduction:
Begin with a short video of a forest canopy and ask students what keeps the air fresh there. Link this to prior learning about gases and energy, reminding them that plants convert CO₂ and water into food and oxygen. State that by the end of the lesson they will be able to describe the photosynthesis process and its environmental significance.
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Lesson Structure:
- Do‑now (5'): Students answer a quick quiz on reactants and products of photosynthesis displayed on the board.
- Mini‑lecture (10'): Present the overall equation and role of chlorophyll using slides.
- Interactive model (12'): Show an animation of light absorption and water splitting; students label a diagram.
- Guided inquiry (15'): In groups, students arrange step‑by‑step cards of the photosynthetic process and justify each step.
- Concept check (8'): Quick Kahoot quiz covering electron transport and the Calvin cycle.
- Application discussion (10'): Discuss how photosynthesis improves air quality and climate; students note one real‑world implication.
- Exit ticket (5'): Write one sentence describing the key step they found most interesting.
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Conclusion:
Summarise how light energy, chlorophyll, water and CO₂ combine to produce glucose and O₂, highlighting the environmental benefits. Ask each student to write a one‑sentence exit ticket describing the most important step they learned. Assign homework to create a labelled cross‑section diagram of a leaf for the next class.
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