Lesson Plan for Junior Secondary 3 - Basic Tech - Orthographic Drawing

**Basic Technology Lesson Plan: Orthographic Drawing** --- **Grade Level:** Junior Secondary 3 **Subject:** Basic Technology **Topic:** Orthographic Drawing **Duration:** 60 minutes **Objectives:** By the end of this lesson, students will be able to: 1. Understand the concept of orthographic drawing. 2. Identify the different views used in orthographic projection. 3. Apply basic techniques to create simple orthographic drawings. **Materials:** - Whiteboard and markers - Chart paper - Pencils, rulers, erasers - Examples of orthographic drawings (printed or projected) - Graph paper - Handouts with practice exercises **Lesson Structure:** **Introduction (10 minutes):** 1. **Greeting and Roll Call (2 minutes):** - Welcome students and take attendance. 2. **Hook (3 minutes):** - Show an object (e.g., a small box) and ask students how they might draw it from different angles. Introduce the term "orthographic drawing" as a method used to represent 3D objects in 2D space. 3. **Learning Objectives (2 minutes):** - Present the objectives of the lesson. 4. **Background Knowledge (3 minutes):** - Briefly discuss the importance of technical drawing in various fields like architecture, engineering, and design. **Instruction (20 minutes):** 1. **Explanation of Orthographic Drawing (10 minutes):** - Define orthographic drawing. - Explain the three standard views: front view, top view, and side view. - Use a simple object and demonstrate how to identify and draw its different views on the whiteboard or chart paper. 2. **Guided Practice (10 minutes):** - Distribute example objects (e.g., simple geometric shapes like cubes or cylinders) and guide students through drawing the three views step-by-step. - Walk around the classroom to provide individual assistance as needed. **Activity (15 minutes):** 1. **Practice Exercise:** - Hand out graph paper and pencils. Ask students to choose an object from their desk or classroom and draw its orthographic projections. - Encourage students to first sketch lightly and then darken the lines once they are satisfied with the proportions and alignment. **Review and Discussion (10 minutes):** 1. **Group Sharing (5 minutes):** - Allow students to pair up and discuss their drawings with a partner. They should check each other's work for accuracy and completeness. 2. **Class Discussion (5 minutes):** - Bring the class back together and ask a few volunteers to display their drawings. - Discuss common challenges and solutions. Reinforce the importance of accuracy and neatness in technical drawing. **Assessment (5 minutes):** - Collect the students' orthographic drawings to evaluate their understanding and provide feedback. - Consider providing a short quiz or exit ticket with a few basic questions on orthographic drawing to assess understanding. **Closure (5 minutes):** 1. **Summary:** - Summarize the key points covered during the lesson. 2. **Question and Answer:** - Allow time for students to ask questions. 3. **Preview of Next Lesson:** - Briefly discuss the next topic to build anticipation. **Homework:** - Assign students to find an everyday object at home and create orthographic drawings (front, top, and side views). They should bring these drawings to the next class for review. --- **Additional Notes:** - Differentiate instruction by providing more complex objects to advanced students or offering additional support to those who need it. - Utilize digital drawing tools or apps if available to enhance learning and engagement. --- End of Lesson Plan


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