- Class: Primary 4
- Term: 2nd Term
- Week: 10
- Age: 9 years
- Duration: 40 minutes
- Subject: Basic Science Technology
- Curriculum Theme: Basic Science
- Topic: Water
- Content: Pure And Impure Water
Specific Objectives:
- Cognitive Domain: Pupils should be able to list and describe the qualities of pure and impure water.
- Affective Domain: Pupils should develop an understanding and appreciation of the importance of water purity.
- Psychomotor Domain: Pupils should be able to perform simple tests to distinguish between pure and impure water.
- Social Domain: Pupils should engage in discussions about water purity and its impact on health and the environment.
Reference Materials:
- 9 – Years Basic Education Curriculum
- Abuja Educational Resource Centre Scheme of work
- NAPPS National Unified Scheme of Work
- Online Information
- Textbooks
Instructional Materials:
- Samples of pure and impure water
- Charts depicting water purification processes
- Projector or slides showing effects of impure water
Rationale for the Lesson:
Understanding the concept of pure and impure water is crucial as it relates directly to health, environmental awareness, and science literacy. This knowledge is foundational for promoting healthy living and environmental stewardship among pupils.
Prerequisite/Previous Knowledge:
Basic understanding of water and its common uses.
INSTRUCTIONAL PROCEDURES:
Content Development: Pure And Impure Water
| Content | Time | Teaching Method | Teaching Strategy | Teacher’s Activity | Pupil’s Activity | Learning Point |
|---|---|---|---|---|---|---|
| Introduction to Water | 5 min | Discussion | Inquiry-based | Introduce topic, ask pupils about their understanding of water | Pupils share their prior knowledge about water | Engaging pupils’ interest and assessing prior knowledge |
| Explaining Pure Water | 10 min | Lecture | Expository | Explain the qualities of pure water | Listening and asking questions | Understanding the concept of pure water |
| Explaining Impure Water | 10 min | Lecture & Demonstration | Expository & Interactive | Show examples of impure water, discuss sources of contamination | Observing and identifying differences | Recognizing impure water |
| Practical Test | 5 min | Practical Activity | Hands-on | Demonstrate a simple test to identify pure water | Pupils perform the test | Applying knowledge in a practical context |
| Discussion on Water Purity | 5 min | Group Discussion | Collaborative Learning | Facilitate a discussion on the importance of water purity | Participate in group discussion | Understanding the impact of water purity on health and environment |
| Note Taking | 5 min | Writing | Reflective | Guide pupils to take notes | Pupils take notes | Summarizing and internalizing the lesson |
| Evaluation | 3 min | Question & Answer | Assessment | Ask questions related to the topic | Pupils respond to questions | Assessing understanding of the topic |
| Conclusion | 2 min | Summarizing | Reflective | Sum up the lesson, highlighting key points | Listening and internalizing the summary | Reinforcing the lesson’s main points |
Classroom Note:
Qualities Of Pure Water
- Clear Appearance: Pure water is completely clear and transparent, without any color.
- No Smell: It has no distinct smell, indicating the absence of impurities that could cause odors.
- No Taste: Pure water should have a neutral taste, without any bitterness, saltiness, or sweetness.
- Free of Sediments: There should be no visible particles or sediments floating in or settling at the bottom of pure water.
- Safe for Drinking: Pure water is safe for consumption, meaning it doesn’t contain harmful bacteria, viruses, or chemicals.
Qualities Of Impure Water
- Cloudy Appearance: Impure water often has a cloudy or look due to suspended particles like dirt or sand.
- Unpleasant Odor: It may have a foul or unusual smell, which can be due to the presence of chemicals.
- Strange Taste: Impure water can have a metallic, sour, or otherwise unpleasant taste, indicating the presence of various contaminants.
- Presence of Microorganisms: Impure water may contain bacteria, viruses, and parasites, which are not visible to the naked eye but can be harmful if consumed.
- Contains Chemicals and Metals: It might have harmful chemicals, heavy metals like lead or mercury, or excessive minerals, contributing to its impurity.
Importance Of Clean Water
- Health: Clean water is essential for good health.
- Hydration: Clean water is crucial for hydration, which is important for all bodily functions.
- Cooking: Clean water is necessary for cooking, ensuring that the food prepared is safe and healthy to eat.
- Personal Hygiene: It is vital for personal hygiene practices like bathing and brushing teeth.
- Agriculture: Clean water is important for agriculture to grow healthy crops, which are vital for nutrition and food security.
Evaluation:
- What are three qualities of pure water?
- Name two differences between pure and impure water.
- Why is it important to have access to pure water?
Note to Teachers:
Customize the lesson content, teaching methods, and pupil activities to suit your teaching style, curriculum, and available resources.
Evaluation Questions:
