Health and Hygiene Water Purification Physical and Health Education Primary 2 Third Term Lesson Notes Week 1

Subject: Physical and Health Education

Class: Primary 2

Term: Third Term

Week: 1

Topic: Health and Hygiene

Sub-topic: Ways of purifying water

Duration: 40 minutes

Behavioural Objectives: By the end of the lesson, pupils should be able to:

  1. Identify different ways of purifying water.
  2. Describe how each method of purifying water works.
  3. Explain the importance of drinking clean water.

Key Words: Purify, Boil, Filter, Germs, Solar disinfection.

Entry Behaviour: Pupils should have basic knowledge of why water is important.

Learning Resources and Materials: Clear plastic bottles, cloth or filter, water tablets, water, pot, stove, cups.

Building Background / Connection to Prior Knowledge: Ask pupils what they know about water and why we need to drink clean water. Discuss how dirty water can make us sick.

Embedded Core Skills: Critical thinking, problem-solving.

Learning Materials:

  • Clear plastic bottles
  • Water filter
  • Water tablets
  • Pot and stove
  • Cups

Reference Books: Lagos State Scheme of Work

Instructional Materials: Clear bottles, water filter, water tablets, pot, stove.


  1. Importance of clean water.
  2. Ways of purifying water: boiling, filtering, using water tablets, and solar disinfection.

Hello, class! Today, we will talk about how to make water clean and safe to drink. Clean water is important for our health. Let’s learn some ways to purify water! 😊

  1. Boiling
    • Heat water until it bubbles (boils).
    • Boiling kills germs in the water.
  2. Filtering
    • Use a clean cloth or filter to remove dirt from water.
    • Pour water through the cloth or filter to clean it.
  3. Using Water Tablets
    • Put a water tablet in the water.
    • The tablet will kill germs and make the water safe to drink.
  4. Using Solar Disinfection
    • Place a clear plastic bottle filled with water in the sun.
    • Leave it in the sun for a few hours to kill germs.

Remember to always drink clean water! Stay healthy! 😊

Class Activity Discussion :

  1. What is purifying water?
    • Purifying water means making water clean and safe to drink.
  2. Why should we purify water?
    • To keep us healthy and avoid sickness from dirty water.
  3. How do we purify water?
    • By boiling, filtering, using tablets, or sunlight.
  4. What does boiling water do?
    • It kills germs and makes water clean.
  5. How long should we boil water?
    • For about 3 to 5 minutes.
  6. What is filtering water?
    • It is using a cloth or filter to remove dirt from water.
  7. What can we use to filter water?
    • A clean cloth, filter, or special filter bottle.
  8. What are water tablets?
    • Little tablets that clean water by killing germs.
  9. How do you use water tablets?
    • Drop one tablet in water and wait a while.
  10. What is solar disinfection?
    • Putting water in the sun to clean it.
  11. How do we do solar disinfection?
    • Fill a clear bottle with water and leave it in the sun.
  12. How long should the bottle stay in the sun?
    • For at least 6 hours.
  13. What is another way to purify water?
    • Using special water purifiers or filters.
  14. Can we use any kind of bottle for solar disinfection?
    • Use a clear plastic bottle without any colors.
  15. What happens if we drink dirty water?
    • We can get sick and have stomach pains.

Stay healthy and drink clean water! 😊

  1. We can purify water by ______ it. a) freezing b) washing c) boiling d) covering
  2. Boiling water kills ______. a) toys b) germs c) plants d) colors
  3. To filter water, use a ______ cloth. a) dirty b) wet c) torn d) clean
  4. Water tablets help to kill ______ in water. a) stones b) sand c) germs d) fish
  5. When you put water in the sun, it uses ______ disinfection. a) solar b) wind c) ice d) rain
  6. Water is safe to drink when it is ______. a) cold b) clean c) hot d) sweet
  7. Solar disinfection needs a clear ______ bottle. a) glass b) green c) metal d) brown
  8. You should boil water for at least ______ minutes. a) 5 b) 20 c) 30 d) 60
  9. A water filter can remove ______ from water. a) stars b) sugar c) sand d) leaves
  10. Using a water tablet makes water ______. a) blue b) fresh c) wet d) salty
  11. Clean water helps us stay ______. a) tired b) healthy c) bored d) hungry
  12. You can use a filter to remove ______ from water. a) toys b) dirt c) clothes d) clouds
  13. Putting a water tablet in water makes it ______ to drink. a) dirty b) hard c) safe d) hot
  14. To purify water, we can use solar ______. a) fire b) food c) wind d) energy
  15. When you boil water, watch for ______ to make sure it is boiling. a) bubbles b) ice c) smoke d) water


Step 1: The teacher revises the previous topic on health and hygiene and asks the pupils about why water is important and how dirty water can make us sick.

Step 2: The teacher introduces the new topic on ways of purifying water. The teacher demonstrates boiling water using a pot and stove, and filtering water using a clean cloth.

Step 3: The teacher allows the pupils to share what they know about purifying water. The teacher corrects any misunderstandings and explains how water tablets and solar disinfection work.

Teacher’s Activities:

  • Explain the importance of clean water.
  • Demonstrate different ways to purify water.
  • Answer pupils’ questions.

Learners’ Activities:

  • Listen to the teacher.
  • Watch the demonstrations.
  • Ask questions about purifying water.


  • Ask pupils to explain one way of purifying water.
  • Ask pupils why drinking clean water is important.

Evaluation Questions:

  1. What does it mean to purify water?
  2. Name one way to purify water.
  3. How does boiling water make it clean?
  4. What can you use to filter water?
  5. How do water tablets help clean water?
  6. What is solar disinfection?
  7. Why is clean water important for our health?
  8. What happens when we drink dirty water?
  9. What are germs?
  10. How long should we boil water?

Conclusion: The teacher goes around the class to mark pupils’ work and provide feedback. Reinforce the importance of drinking clean water and how to purify it using different methods. End the lesson by encouraging pupils to share what they learned with their families.

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