Lesson Plan for Senior Secondary 1 - Technical Drawing - Quadrilaterals

### Lesson Plan: Quadrilaterals in Technical Drawing **Level:** Senior Secondary 1 **Subject:** Technical Drawing **Topic:** Quadrilaterals **Duration:** 90 minutes **Objective:** - By the end of the lesson, students will be able to: - Understand the properties and types of quadrilaterals. - Accurately draw different types of quadrilaterals using technical drawing tools. - Apply concepts of symmetry and dimension in technical drawings. ### Materials Needed: - Drawing boards - Drawing paper - T-squares - Set squares - Compasses - Protractors - Pencils - Erasers - Rulers - Handouts on quadrilaterals ### Lesson Outline: **1. Introduction (15 minutes)** *Greeting and Attendance* - Greet the students and take attendance. *Motivation (Hook)* - Show various real-life examples of quadrilaterals (e.g., windows, tiles, building blueprints). - Ask students to identify and describe any familiar quadrilaterals they see around them. **2. Theoretical Background (15 minutes)** *Definitions and Properties* - Define a quadrilateral: A four-sided polygon with four vertices and four angles. - Describe basic properties: Sum of interior angles is 360 degrees. *Types of Quadrilaterals* - Explain different types of quadrilaterals (Square, Rectangle, Rhombus, Parallelogram, Trapezium, and Kite). - Square: Four equal sides, four right angles. - Rectangle: Opposite sides equal, four right angles. - Rhombus: Four equal sides, opposite angles equal. - Parallelogram: Opposite sides parallel and equal, opposite angles equal. - Trapezium (Trapezoid): At least one pair of parallel sides. - Kite: Two pairs of adjacent sides equal. **3. Practical Application (45 minutes)** *Demonstration* (15 minutes) - Perform a step-by-step demonstration of how to draw a square using technical drawing tools. - Start with precise measurements. - Use T-squares and set squares to maintain 90-degree angles. - Check alignment to ensure accuracy. *Guided Practice* (15 minutes) - Distribute handouts and drawing materials. - Instruct students to draw a square, a rectangle, and a parallelogram by following step-by-step instructions. - Walk around the classroom to provide individual assistance and correct common mistakes. *Independent Practice* (15 minutes) - Ask students to choose two other types of quadrilaterals (rhombus, trapezium, or kite) and draw them on their own. - Encourage students to check their work for accuracy. **4. Review and Q&A (10 minutes)** *Recap Major Points* - Summarize the properties and types of quadrilaterals covered. - Highlight common mistakes to avoid in technical drawings. *Q&A Session* - Open the floor to any questions from students regarding the lesson. - Clarify any misunderstandings. **5. Assessment and Homework (5 minutes)** *Immediate Assessment* - Collect students’ drawings for a quick review. - Provide constructive feedback on their techniques and accuracy. *Homework Assignment* - Assign students to research real-life applications of each type of quadrilateral. - Ask them to come prepared to discuss their findings in the next class. **6. Closing (5 minutes)** *Wrap-Up* - Thank students for their participation. - Remind them of the importance of precision and neatness in technical drawing. **7. Clean-Up (5 minutes)** - Ensure students clean up their workstations and return tools properly. --- ### Differentiation: - For advanced learners, challenge them with more complex quadrilaterals or ask them to draw quadrilaterals to scale from given blueprints. - For slower learners, provide additional supervised practice sessions and simplified instructions. --- ### Follow-Up: - In the next lesson, students will explore more complex polygons and begin to incorporate angles and measurements for specific technical projects.