Lessonplan for Senior Secondary 2 students on the topic of "Pictorial Views" in Technical Drawing:
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**Grade Level: Senior Secondary 2**
**Subject: Technical Drawing**
**Topic: Pictorial Views**
**Duration: 90 minutes**
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### **Objectives:**
By the end of the lesson, students should be able to:
1. Understand the different types of pictorial views: Isometric, Oblique, and Perspective.
2. Accurately produce simple pictorial drawings.
3. Interpret and convert orthographic projections into pictorial drawings.
4. Use drawing tools effectively to produce technical drawings.
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### **Materials Needed:**
- Drawing paper
- T-Squares
- Set squares
- Protractors
- Compasses
- Pencils (various grades)
- Erasers
- Rulers
- Examples of pictorial view drawings
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### **Introduction (15 minutes):**
1. **Greeting and Attendance** (2 minutes)
2. **Brief Review** (3 minutes)
- Quick recap of previous lesson on orthographic projection to establish a connection with pictorial views.
3. **Lesson Introduction** (10 minutes)
- Explain what pictorial views are and their importance in providing a 3D representation of objects.
- Briefly introduce the three types of pictorial drawings: Isometric, Oblique, and Perspective.
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### **Instructional Content (50 minutes):**
1. **Isometric Drawing (20 minutes)**
- **Explanation** (5 minutes)
- Define isometric drawing and explain its characteristics: equal angles (120°) between axes, true scale along axes.
- **Demonstration** (10 minutes)
- Use the board or projector to demonstrate how to start an isometric drawing using a simple object (e.g., a cube or a simple geometric shape).
- **Student Practice** (5 minutes)
- Students attempt to draw a similar object in their notebooks using isometric principles.
2. **Oblique Drawing (15 minutes)**
- **Explanation** (5 minutes)
- Define oblique drawing, explain its features, and mention the two types: cavalier and cabinet.
- Discuss the angle used for depth (usually 45°) and scale reduction in Cabinet oblique.
- **Demonstration** (5 minutes)
- Demonstrate how to create an oblique view of a simple object.
- **Student Practice** (5 minutes)
- Students practice by drawing an object in oblique view, applying the correct angles and scale reductions.
3. **Perspective Drawing (15 minutes)**
- **Explanation** (5 minutes)
- Define perspective drawing and how it differs from isometric and oblique drawings.
- Discuss vanishing points and horizon lines.
- **Demonstration** (5 minutes)
- Show how to draw a one-point perspective drawing of a simple object (e.g., a box).
- **Student Practice** (5 minutes)
- Students begin a simple one-point perspective drawing, focusing on positioning vanishing points and horizon lines accurately.
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### **Activity (15 minutes):**
1. **Group Activity (15 minutes)**
- Divide the students into small groups and provide each group with an orthographic projection of a simple object.
- Assign each group to create an isometric, oblique, and one-point perspective view of the given object.
- Circulate around the classroom, offering guidance and checking their progress.
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### **Conclusion (10 minutes):**
1. **Review and Recap (5 minutes)**
- Summarize the key points covered: the characteristics of each type of pictorial view and the steps to create each.
- Ask students to share their group work and discuss any challenges they faced.
2. **Q&A (3 minutes)**
- Allow time for students to ask questions and clarify any doubts.
3. **Assignment and Closing Remarks (2 minutes)**
- Give a homework assignment: Create a pictorial drawing of a more complex object (e.g., a piece of furniture) in isometric, oblique, and one-point perspective views.
- Encourage students to practice using the tools and techniques discussed.
- Announce the next lesson on more advanced Technical Drawing topics.
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### **Assessment:**
1. **Group Activity Evaluation**
- Assess the accuracy and quality of the group drawings during the class activity.
2. **Homework Assignment**
- Evaluate the students' submitted work on their complex pictorial drawings.
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This lesson plan provides a comprehensive approach to introducing students to pictorial views in technical drawing, ensuring they gain both theoretical understanding and practical skills.