Lesson Plan for Senior Secondary 2 - Technical Drawing - ngineering Drawing-free-hand Sketching Including

**Lesson Plan for Senior Secondary 2: Technical Drawing - Engineering Drawing: Free-Hand Sketching (Pictorial and Orthographic Sketching)** --- **Lesson Title:** Engineering Drawing - Free-Hand Sketching of Engineering Components **Grade Level:** Senior Secondary 2 **Subject:** Technical Drawing **Duration:** 90 minutes --- ### **Learning Objectives:** By the end of the lesson, students should be able to: 1. Understand the concepts of free-hand sketching. 2. Produce free-hand pictorial sketches of engineering components. 3. Produce free-hand orthographic sketches of engineering components. 4. Identify and apply the correct proportions and dimensions in sketches. 5. Improve hand-eye coordination and precision in technical drawing. ### **Materials Needed:** - Pencils (HB, 2B) - Erasers - A3 and A4 size plain sheets - Rulers - Set squares - Engineering components or models (e.g., nuts, bolts, brackets) - Projection equipment (optional, for initial teaching) ### **Lesson Outline:** #### **1. Introduction (15 minutes)** - **Greeting and Settle Down** - Welcome students. - Briefly discuss the importance of engineering drawing in the field of engineering and manufacturing. - **Explanation of Terms** - Define and differentiate between pictorial and orthographic sketches. - **Pictorial Sketching**: Creating a sketch that shows a three-dimensional view of the object. - **Orthographic Sketching**: Creating a multi-view sketch (front, top, side) that represents the object's dimensions accurately. - **Objective Overview** - Explain the objectives of the lesson and what students will achieve by the end. #### **2. Demonstration (15 minutes)** - **Pictorial Sketching Demonstration** - Choose an engineering component (e.g., a simple bracket). - Demonstrate how to sketch the object pictorially, highlighting key steps: - Outline the overall shape. - Add details and refine shapes. - Ensure proportional dimensions. - **Orthographic Sketching Demonstration** - Using the same component, demonstrate: - How to draw three main views (front, top, and side). - The importance of aligning views and maintaining consistency in dimensions. - **Display Finished Sketches** - Show completed examples of both pictorial and orthographic sketches. #### **3. Guided Practice (35 minutes)** - **Student Activity: Pictorial Sketching** - Distribute the first engineering component or model to the students. - Guide students step-by-step through the free-hand pictorial sketching process. - Provide individual assistance as they work on their sketches. - **Student Activity: Orthographic Sketching** - Distribute the second engineering component or model. - Lead students in creating orthographic projections: - Front view - Top view - Side view - Ensure students properly align views and keep dimensions consistent. #### **4. Independent Practice (20 minutes)** - **Free Practice** - Allow students to choose an additional component. - Instruct them to independently create both pictorial and orthographic sketches. - Move around the classroom and provide feedback and corrections as needed. #### **5. Conclusion (5 minutes)** - **Review and Recap** - Recap the key points and processes learned during the lesson. - Discuss common challenges faced and tips to overcome them. - **Assessment** - Collect sketches for evaluation. - Provide constructive feedback. - **Homework Assignment** - Assign homework to practice free-hand sketching of a household item, emphasizing both pictorial and orthographic views. #### **6. Closing (5 minutes)** - **Encouragement and Motivation** - Praise students for their efforts. - Highlight the importance of continual practice. - Adjourn the class. ### **Assessment:** - Evaluate students' sketches based on: - Accuracy - Proportionality - Level of detail - Neatness ### **Follow-Up:** - Plan future lessons to introduce more complex components. - Encourage use of CAD software for advanced students, building on their free-hand sketching skills. --- This lesson plan is designed to foster both technical skills and creativity in students, giving them a solid foundation in engineering drawing essential for their future studies and careers.