Lesson Plan

• Describe the role of chlorophyll in capturing light energy.
• Explain how chlorophyll initiates the light‑dependent reactions.
• Identify the chloroplast locations where chlorophyll functions.
• Compare the effects of chlorophyll deficiency on photosynthesis.
• Summarise how chlorophyll contributes to the production of ATP, NADPH, and glucose.

• Projector and screen
• PowerPoint slides with chlorophyll diagrams
• Printed handout of chloroplast structure
• Fresh green leaf samples
• Colored markers / pens
• Worksheet with short questions
• Exit‑ticket slips

Begin with a quick “What gives plants their green colour?” poll poll to activate prior knowledge. Highlight that colour comes from a pigment that does more than colour – it drives the plant’s food factory. State today’s success criteria: students will be able to state why chlorophyll is essential and link it to the light‑dependent reactions.

1. Do‑Now (5'): Students write a one‑sentence answer to “What would happen if a plant had no green pigment?” (quick share).
2. Mini‑lecture with slides (10'): Explain chlorophyll’s location, light‑absorption spectrum, and its two key functions.
3. Interactive diagram activity (10'): In pairs, label a chloroplast diagram showing thylakoid membranes and stroma.
4. Demonstration (5'): Use leaf samples and a flashlight to show colour change under different coloured filters.
5. Guided practice (10'): Worksheet questions linking chlorophyll to ATP/NADPH production and the Calvin cycle.
6. Check for understanding (5'): Quick “thumbs up/down” quiz on the two essential roles of chlorophyll.
7. Transition to next lesson (5'): Preview how the products of photosynthesis are used by the plant.

Recap the two essential functions of chlorophyll and why its absence stops photosynthesis. Students complete an exit ticket stating one real‑world implication of chlorophyll loss (e.g., crop yield). Assign a short homework: research a plant that uses a different pigment and note how its photosynthesis differs.