Activity 01
Hands-On: Balloon Lung Model
Inflate balloons inside plastic bottles to represent lungs. Students add tissue paper 'filters' and blow air through straws to simulate clean versus polluted breathing. Discuss how dirty air clogs the filters, mimicking lung irritation. Record observations in notebooks.
Explain what causes air to become dirty or polluted.
Facilitation TipDuring the Balloon Lung Model, remind students to squeeze the balloon slowly to mimic natural breathing, not forceful puffs, to show how pollutants restrict airflow.
What to look forShow students pictures of different activities (e.g., a car driving, a factory, planting a tree, a bicycle). Ask them to sort the pictures into two groups: 'Makes Air Dirty' and 'Keeps Air Clean'. Discuss their choices briefly.
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Activity 02
Schoolyard: Pollution Source Hunt
Provide checklists of pollution sources like vehicles, dust, and smoke. Groups walk the school grounds, tally findings, and note clean areas. Back in class, share data on a chart and brainstorm reductions.
Predict what would happen to our lungs if we breathed dirty air every day.
Facilitation TipBefore the Pollution Source Hunt, give each pair a simple checklist with pictures of common local pollutants like vehicle smoke, burning garbage, and construction dust.
What to look forAsk students: 'Imagine you have a friend who coughs a lot. What are two reasons why their lungs might be hurting because of the air outside? What is one thing you could tell them to do to help their lungs feel better?'
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Activity 03
Design: Clean Air Poster Challenge
In pairs, students draw pollution causes and solutions like planting trees or using public transport. Add slogans in English and local language. Display posters in school corridors for peer voting.
Design ways we can help keep the air clean in our community.
Facilitation TipFor the Clean Air Poster Challenge, provide large sheets and ask students to include at least one tree or plant as a solution in their designs.
What to look forGive each student a small piece of paper. Ask them to draw one thing that makes the air dirty and one thing that helps keep the air clean. They should label their drawings if they can.
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Activity 04
Experiment: Simple Air Filter Test
Set up jars with water and cotton as filters. Students add chalk dust for pollution, blow through straws, and observe trapped particles. Compare filtered and unfiltered jars to see cleaning effects.
Explain what causes air to become dirty or polluted.
Facilitation TipWhile doing the Simple Air Filter Test, have students predict which material will trap the most dust before testing, then record results on a shared class chart.
What to look forShow students pictures of different activities (e.g., a car driving, a factory, planting a tree, a bicycle). Ask them to sort the pictures into two groups: 'Makes Air Dirty' and 'Keeps Air Clean'. Discuss their choices briefly.
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Generate Complete Lesson→A few notes on teaching this unit
Teachers should avoid long explanations about chemical pollutants; instead, use relatable examples like dust on school benches or the smell of vehicle exhaust near roads. Research shows young children learn best when activities let them touch, move, and discuss together. Avoid lectures about long-term health effects—focus on immediate feelings like coughing or difficulty breathing to build empathy and understanding.
By the end of these activities, students will point to real-world examples of pollution, describe how dirt enters lungs, and suggest plant-based solutions like natural air filters. They should connect each activity’s outcome to protecting their own health and the environment around them.
Watch Out for These Misconceptions
During the Simple Air Filter Test, watch for students who think only visible black smoke harms lungs.
Remind them that invisible gases and tiny dust particles from vehicles and construction also harm lungs. Have students shake the filter after testing to see trapped dust, then discuss how even clean-looking air can carry hidden pollutants.
During the Balloon Lung Model, watch for students who believe short-term breathing difficulty is harmless.
Ask students to feel the balloon’s resistance when squeezed slowly and compare it to a friend’s lungs. Use this to explain how repeated exposure to pollutants causes coughs or asthma over time, making the model a physical reminder of long-term risks.
During the Pollution Source Hunt, watch for students who think only big factories cause pollution.
Point out local sources like idling school buses or burning trash piles. After the hunt, have students map their findings and discuss how everyday actions add up, using their collected evidence to correct the misconception through peer discussion.
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