Purification Of Water for Primary 3

Class: Primary Three
Term: Third Term
Subject: Basic Science and Technology
Curriculum Theme: Basic Science
previous Lesson: Meaning, Types, Dangers and Contaminants of Contaminated Water
Topic: Purification of Water
Content/Learning Area: Purification of Water, Importance of Drinking Clean water
Time Allocation: 40 minutes

Performance Objectives

by the end of the lesson, pupils should be able to:

• Cognitive Domain:

1. List at least three methods of purifying water.
2. Explain the importance of drinking clean water.
3. Affective Domain:
4. Appreciate the importance of drinking clean and safe water.
5. Psychomotor Domain:
6. Demonstrate how to use a simple water filter.
7. Social Domain:
8. Participate actively in group discussions about water purification.

Reference Materials

• 9 – Years Basic Education Curriculum
• Abuja Educational Resource Center Scheme of Work
• NAPPS National Unified Scheme of Work
• Online Information
• Relevant Textbooks

Instructional Materials

to deliver this lesson, the teacher will use the following materials:

• Whiteboard or chart
• Markers or chalk
• Simple water filter (for exhibition)
• Pictures or diagrams showing different water purification methods

Rationale for the Lesson

This lesson is crucial for pupils’ understanding of hygiene and health. learning about water purification equips them with practical skills to protect themselves from waterborne diseases and promotes healthy habits for life.

Prerequisite/Previous Knowledge

The teacher will start by asking pupils what they remember from the previous lesson on contaminated water. A brief review will be conducted, followed by introducing the topic of water purification as a solution to the problems of contaminated water.

Lesson Content

Purification of Water

Clean water is essential for good health. Several methods purify water, making it safe to drink. These include:

1. Boiling: Heating water for at least one minute kills harmful germs.
2. Filtration: Using a filter removes particles and some microorganisms.
3. Chlorination: Adding chlorine tablets kills bacteria and viruses.
4. Distillation: Heating water to create steam, then condensing it back into liquid removes impurities.
5. Using UV Light: Ultraviolet light destroys bacteria and viruses.
6. Solar Disinfection (SODIS): exposing water in a clear container to sunlight for a certain period.
7. Aeration: Exposing water to air to remove dissolved gases and improve taste.

Importance of Drinking Clean Water

Clean water is vital for several reasons:

1. Prevents Diseases: It prevents waterborne illnesses like cholera and typhoid.
2. Supports Body Functions: Water is crucial for digestion, circulation, and temperature regulation.
3. Boosts Immune System: Clean water helps maintain a strong immune system.
4. Promotes Overall Well-being: Staying hydrated improves energy and mental clarity.
5. Aids Nutrient Absorption: Clean water helps the body absorb essential nutrients from food.
6. Maintains Healthy Skin: Adequate hydration keeps the skin supple and healthy.

Teaching Methods

To deliver this lesson,‌ ⁤the teacher will⁤ adopt⁤ the following methods: Clarification, demonstration, Question and Answer, Group Discussion.

Instructional Procedures

to deliver this lesson, the teacher will adopt the following steps:

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: Briefly review the previous lesson on contaminated water. Introduce the topic of water purification.
Pupils’ Activity: Answer questions about contaminated water, listen attentively to the introduction of the new topic.

Step 2: Explanation of Key Concepts

Time: 10 minutes
Teaching Skill: Explanation
Teacher’s Activity: Explain different methods of water purification (boiling,filtration,chlorination,distillation,UV light).
Pupils’ Activity: Listen attentively, ask clarifying questions.

Step 3: Demonstration of Water Filter

Time: 10 minutes
Teaching Skill: Demonstration, Guided Practice
Teacher’s Activity: Demonstrate how to use a simple water filter.
Pupils’ Activity: Observe the demonstration, participate in guided practice.

Step 4: Self-reliant Practice

Time: 5 minutes
Teaching Skill: Monitoring, Feedback
Teacher’s Activity: supervise pupils as they work individually or in groups on a simple water filtration activity.
Pupils’ Activity: Complete the activity independently or in groups.

Step 5: Note-Taking

Time: 5 minutes
Teaching Skill: Note-Taking, Summarizing
Teacher’s Activity: Guide pupils in taking notes on the key concepts and methods of water purification.
Pupils’ Activity: Take notes,summarize key points.

Step 6: Evaluation/Review

Time: 5 minutes
Teaching Skill: Questioning, Feedback
Teacher’s activity: Ask evaluation questions to assess pupils’ understanding.
Pupils’ Activity: Answer evaluation questions.

Objective-aligned checks:

1. List at least three methods of purifying water.
2. Explain the importance of drinking clean water.
3. Demonstrate how to use a simple water filter.

Step 7: Conclusion

Time: 2 minutes
Teaching Skill: Summarizing, Reinforcement
Teacher’s activity: Summarize the main points of the lesson and emphasize the importance of drinking clean water.
Pupils’ Activity: Listen to the summary and ask any remaining questions.

Lesson Keywords

• purification – The process of removing contaminants from water.
• Filtration – The process of removing solid particles from water using a filter.
• Chlorination – The process of adding chlorine to water to kill bacteria.
• Distillation – The process of boiling water and collecting the condensed steam to remove impurities.
• Contamination – The presence of unwanted substances in water.

Lesson Evaluation

To evaluate the learning, the teacher asks pupils to:

1. Name three ways to purify water.
2. Why is it vital to drink clean water?
3. How does a water filter work?
4. Discuss the best way to purify water in different situations (e.g.,at home,during a camping trip).

Assignment/Homework

1. Research and write about another method of water purification not discussed in class.
2. Create a poster illustrating the steps of water purification.
3. Explain how you can ensure the water you drink at home is safe.

Differentiation

• For slower learners: Provide one-on-one assistance and simplified explanations.
• For advanced learners: Challenge them with additional research tasks or group projects on different water purification methods.
• For visual/auditory/kinesthetic learners: Use visual aids, verbal explanations, and hands-on activities to cater to different learning styles.

Note for Teachers

Ensure to use real-life examples and demonstrations to make the lesson engaging and practical for the pupils. Emphasize the importance of clean water for their health and well-being.