Activity 01
Modelling: Lung Capacity Changes
Provide bottles, balloons, and straws for students to build lung models. Compare a 'young' full balloon with an 'aged' partially taped one to show reduced expansion. Add cotton wool as 'tar' from smoking and measure breath volume differences before discussing observations.
What are some of the changes that happen to the human body as people grow older?
Facilitation TipDuring lung capacity modeling, have students repeat each breath measurement three times to account for natural variability in effort.
What to look forStudents write down two ways their lungs might function differently from an elderly person's. Then, they list one specific action an older person can take to protect their lungs.
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Activity 02
Survey: School Air Quality Audit
Equip groups with settling dust collectors or simple particle testers. Map pollution sources like traffic or litter around school. Analyse data to link findings with respiratory risks and propose improvements.
Describe how an elderly person's body might be different from a young adult's body.
Facilitation TipFor the air quality audit, provide simple tools like sticky notes and clipboards so students can document observations systematically.
What to look forPose the question: 'Imagine two people, one who has smoked for 40 years and one who has never smoked, both aged 70. How might their breathing be different and why?' Facilitate a class discussion, guiding students to use vocabulary like 'tar' and 'emphysema'.
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Activity 03
Interview: Family Ageing Stories
Pairs create question lists on body changes and health tips. Conduct phone or in-person interviews with older relatives. Collate responses into a class chart for shared insights.
Can you name three things older people can do to help their bodies stay healthy?
Facilitation TipGuide interviewers to ask follow-up questions like 'What helps you stay strong as you age?' to uncover positive habits.
What to look forShow images of different environments (e.g., a busy city street, a forest, a smoking room). Ask students to quickly write down one word describing the potential impact of the air quality on lungs for each image.
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Activity 04
Formal Debate: Healthy Habits Role Play
Assign roles as elderly characters facing choices like smoking or exercising. Groups prepare arguments, perform short skits, then vote on best actions with reasons.
What are some of the changes that happen to the human body as people grow older?
Facilitation TipIn the debate, assign roles clearly so students practice listening before responding to counterarguments.
What to look forStudents write down two ways their lungs might function differently from an elderly person's. Then, they list one specific action an older person can take to protect their lungs.
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Generate Complete Lesson→A few notes on teaching this unit
Teachers approach this topic by balancing science with humanity. Start with concrete models to explain physical changes, then layer in real-world evidence through surveys and stories. Avoid framing ageing as a decline only, instead highlighting how choices shape outcomes. Research shows that when students engage with relatable role models, their misconceptions shift more effectively than with textbook explanations alone.
Successful learning looks like students explaining how ageing affects the body with specific examples, identifying healthy habits, and showing curiosity about others' experiences. They should use accurate vocabulary and reflect on how their actions today influence their future health.
Watch Out for These Misconceptions
During Interview: Family Ageing Stories, watch for students assuming all older adults are frail or ill.
Use the interview guide to direct students to ask questions about active hobbies, like gardening or dancing. After hearing stories, ask the class to categorize responses into 'still active' and 'limited by health' to highlight variability and challenge the misconception.
During Modelling: Lung Capacity Changes, watch for students thinking smoking harms only the smoker immediately.
Have students add a teaspoon of soil to each balloon before inflating to represent 'tar' buildup. After modeling, ask them to compare the capacity of the 'smoker' balloon to a clean one and explain why tar reduces lung function over time.
During Debate: Healthy Habits Role Play, watch for students believing lung function remains unchanged from youth to old age.
Provide two lung models: one with elastic bands to represent youthful lungs and one with weakened rubber bands for older lungs. Let students measure capacity with a ruler, then discuss why slower reflexes and breathlessness occur naturally with age.
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