Lesson Plan for Primary 3 - Basic Science and Technology - Purifying Water + Components Of The Cpu

### Lesson Plan: Purifying Water & Components of the CPU **Grade Level**: Primary 3 **Subject**: Basic Science and Technology **Duration**: 60 minutes #### **Objectives:** By the end of the lesson, students should be able to: 1. Understand the importance of clean water. 2. Describe simple methods to purify water. 3. Identify the main components of a computer's CPU. 4. Explain the function of each CPU component. #### **Materials Needed:** - Samples of dirty and clean water - Water filter, boiling equipment (if feasible and safe), and clean cloth for filtration demonstration - Chart or projector with CPU components visual - Sticky notes or small cards - Markers #### **Lesson Structure:** **Introduction (10 minutes):** 1. **Greeting and Roll Call (2 minutes)** - Welcome students and take attendance. 2. **Engaging Question (8 minutes)** - Ask: "Why do we need clean water?" - Discuss the importance of clean water for health and daily activities. - Introduce the topic: Purifying water and Components of the CPU. **Activity 1: Purifying Water (20 minutes):** 1. **Explanation (5 minutes)** - Discuss what dirty water looks like and potential dangers of drinking unclean water (diarrhea, stomach aches, etc.). - Outline simple purification methods: - **Boiling:** Kills germs and bacteria. - **Filtering:** Removes physical impurities. 2. **Demonstration (10 minutes)** - **Boiling:** Show how to boil water (ensure safety and feasibility). - **Filtering:** Demonstrate using a simple filter or clean cloth to remove visible debris. 3. **Discussion (5 minutes)** - Ask students to share if they have seen or used any other methods for purifying water at home. **Activity 2: Components of the CPU (20 minutes):** 1. **Explanation (10 minutes)** - Define what a CPU is (Central Processing Unit) and its importance in a computer. - Introduce main components: - **ALU (Arithmetic Logic Unit):** Takes care of all arithmetic and logical operations. - **CU (Control Unit):** Controls all the operations inside the computer. - **Registers:** Small storage that quickly accesses data and instructions. - Show a diagram chart or projector visual of CPU components. 2. **Interactive Activity (10 minutes)** - **Matching Game:** Distribute sticky notes or cards with the names and functions of CPU components. - Have students match the names to the correct functions on the board. **Conclusion and Review (10 minutes):** 1. **Q&A (5 minutes)** - Review key points by asking questions about water purification methods and CPU components. - Example questions: "What does boiling do to water?", "What is the role of the ALU in a CPU?" 2. **Recap and Homework (5 minutes)** - Summarize the lesson's key learnings. - Assign simple homework: Draw and label a diagram of a CPU, and write a short paragraph about why clean water is important. #### **Assessment:** - **Informal assessment** through participation and answers during Q&A. - **Homework assessment**: Check for correctness in the CPU diagram and clarity in the paragraph about clean water. #### **Additional Notes:** - Ensure active participation by encouraging students to share their ideas and experiences. - Tailor the complexity of explanations to suit Primary 3 students' cognitive levels. - Emphasize safety when discussing or demonstrating boiling water.