Lesson Plan for Junior Secondary 3 - Basic Tech - Metalwork Projects I - Metal Joining

### Lesson Plan: Basic Tech - Metalwork Projects I: Metal Joining **Grade/Level**: Junior Secondary 3 **Duration**: 60 minutes **Subject**: Basic Technology **Topic**: Metalwork Projects I - Metal Joining --- #### Objectives: By the end of the lesson, students should be able to: 1. Understand the basic concepts of metal joining. 2. Identify different methods used in metal joining. 3. Demonstrate a basic understanding of welding, soldering, and brazing. 4. Apply safety measures when working with metal joining techniques. --- #### Materials Needed: - Whiteboard and markers - Multimedia projector and laptop (for showing videos/presentations) - Samples of joined metal pieces (welded, soldered, and brazed) - Protective gear (gloves, goggles) - Basic welding kit (for demonstration) - Soldering iron and solder - Metal pieces for demonstration and practice - Worksheet handouts - Safety data sheets --- #### Lesson Outline: **1. Introduction (5 minutes)** - Greet students and take attendance. - Introduce the topic of the day: Metalwork Projects I - Metal Joining. - Briefly state the objectives of the lesson. **2. Background Information (10 minutes)** - Explain what metal joining is and its significance in metalwork projects. - **Definition**: Metal joining refers to the process of joining two or more metallic parts together to form a single unit. - Discuss the common methods of metal joining: **Welding**, **Soldering**, and **Brazing**. - Use simple definitions and real-life examples to illustrate the methods. **3. Detailed Explanation of Methods (15 minutes)** - **Welding**: - Definition and basic principles. - Common types (Arc welding, MIG welding, TIG welding). - Show a short video on welding techniques. - **Soldering**: - Definition and applications. - Materials used (solder, flux). - Demonstrate soldering on a small metal piece. - **Brazing**: - Definition and differences from soldering. - Materials used (filler metals, flux). - Show samples of brazed joints. **4. Safety Measures (10 minutes)** - Discuss the safety precautions necessary when performing metal joining techniques. - Importance of protective gear (goggles, gloves, aprons). - Proper ventilation and workspace setup. - Demonstrate the use of a welding mask and other safety equipment. - Highlight the importance of following these measures to prevent injury. **5. Hands-On Demonstration (10 minutes)** - Arrange a simple welding demonstration. - Invite a few students (with proper safety gear) to watch closely. - Conduct a short soldering activity where students can practice under supervision. - Display samples of metal pieces joined by different methods for examination. **6. Interactive Q&A Session (5 minutes)** - Encourage students to ask questions about the techniques and safety measures. - Clarify any doubts and reinforce key concepts. **7. Worksheet Handout and Assignment (5 minutes)** - Distribute worksheets containing questions related to the day's lesson. - Explain the assignment: Students should complete the worksheet and bring a simple metal piece joined by one of the methods discussed for the next class. - Provide guidance on how they can safely attempt small metal joining projects at home (under supervision if possible). **8. Conclusion (5 minutes)** - Summarize the key points covered in the lesson. - Highlight the importance of metal joining in real-life applications. - Encourage students to practice and be mindful of safety procedures. --- #### Assessment: - Observe students during the practical demonstration to assess their understanding and application. - Review the completed worksheets for comprehension of the topics discussed. - Evaluate the assignments submitted in the next class for correct application of metal joining techniques. --- #### Resources: - Textbook: Basic Technology for Junior Secondary School Students - Online videos/resources on welding, soldering, and brazing techniques - Local experts or guest instructors, if available, for practical demonstration --- #### Differentiation: - Provide additional support and simplified explanations for students who have difficulty understanding the concepts. - Challenge advanced students with more complex metal joining tasks or projects. --- Thank you, and let's make learning about metal joining a constructive and safe experience!