💨 Why is ventilation important?
Good air needs to move! When we stay in a closed classroom for too long:
CO₂ levels increase
Oxygen levels decrease
We feel sleepy, lose focus, or get headaches
Fresh air helps us stay alert, healthy, and happy.
⏰ When and how should we ventilate?
Open windows during every break.
Try 5–10 minutes every 45 minutes.
Cross-ventilation works best (windows on opposite sides of the room).
🔍 Activity: Open Window Experiment
Use a CO₂ meter (if available) or just observe.
Check how students feel before and after opening the windows.
Record observations like this:
| Time | Window Open? | How Do We Feel? |
|---|---|---|
| 10:00 | No | Sleepy |
| 10:10 | Yes | More focused |
Then discuss: when do you feel best in class?
🧠 What did you learn?
Air must be refreshed regularly.
A simple action like opening the window can improve attention and well-being.
Every student can help keep the air fresh.
Course 2: How to Breathe Better Air at School and at Home
🌱 What simple actions improve air quality?
Add air-purifying plants (like spider plants, aloe vera, peace lily).
Avoid using aerosol sprays or heavy-scented products.
Clean regularly (dust, vacuum, wipe surfaces).
Keep windows slightly open when safe and possible.
Encourage natural light and airflow.
🧩 Activity: “My Classroom Breathes Well”
Create a 3-step plan to improve air in your classroom:
Step 1: Observe – Is the air fresh or stuffy?
Step 2: Improve – Add a plant, open windows more often, rearrange furniture.
Step 3: Share – Make posters or mini-presentations to explain your solution to others.
🤔 What did you learn?
You don’t need expensive equipment to improve indoor air.
Small changes lead to big results.
Everyone plays a role in making the classroom healthier and more comfortable.