Class: Senior Secondary School 1 (SS1 / SSS 1)
Term: Third Term
Week: 2
Age: 15 years
Duration: 45 minutes
Subject: Upholstery
Curriculum Theme: Trade
Previous Lesson: Construction Of A Simple Upholstery Article: Standard Sizes, Working Drawings and Joints.
Topic: CONSTRUCTION OF A SIMPLE UPHOLSTERY ARTICLE
Subject Matter: Demonstration of drawing a given project, Layout of project drawing, Interpreting dimensions on drawing, Preparing drawing for construction

Specific Objectives

By the end of the lesson, pupils should be able to:

Cognitive Domain:

Define project drawing in upholstery.
List the essential tools for project drawing.
Explain the steps involved in laying out a project drawing.
Describe how to interpret dimensions on an upholstery drawing.

Affective Domain:

Appreciate the importance of accurate drawing in upholstery construction.
Develop patience and attention to detail when creating project drawings.
Show interest in learning new drawing techniques.

Psychomotor Domain:

Demonstrate the correct use of drawing tools to create a simple upholstery project drawing.
Accurately lay out a given upholstery project drawing.
Measure and mark dimensions correctly on a drawing.
Prepare a drawing for actual construction by adding necessary details.

Collaborate with peers to review and correct project drawings.
Communicate clearly about drawing interpretations and construction plans.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Basic Technology (JSS 1-3) & Senior Secondary Education Curriculum for Trade Subjects.
Lagos State Unified Scheme of Work for Senior Secondary Schools.
Upholstery Craft Practice for Senior Secondary Schools by O. A. Adebayo.
https://www.curriculum.neco.gov.ng
https://www.waecdirect.org

Instructional Materials

The teacher will teach this lesson with the aid of:

Drawing board
Pencils (HB, 2B)
Ruler (metre rule, set square)
Eraser
Sample project plan/drawing of a simple upholstery article (e.g., a stool or cushion).
Measuring tape

Rationale for the Lesson

This lesson is important because it introduces pupils to the fundamental skill of technical drawing, which is essential for accurate upholstery construction. Understanding how to draw, lay out, and interpret project plans helps pupils to avoid errors and produce high-quality finished products.

Prerequisite/Previous Knowledge

Pupils should have basic knowledge of measurement, using rulers, and simple geometric shapes.

Lesson Content/Board Summary

CONSTRUCTION OF A SIMPLE UPHOLSTERY ARTICLE

Project Drawing in Upholstery

Project drawing in upholstery is the process of creating a visual representation or plan of an upholstery article before its actual construction. It shows the shape, size, and components of the item.

Tools and Materials for Drawing

The following are common tools and materials used for upholstery project drawing:

Drawing board: A smooth, flat surface for drawing.
Pencils: Used for sketching and drawing lines (e.g., HB for general use, 2B for darker lines).
Ruler/Set square: For drawing straight lines and accurate angles.
Eraser: For correcting errors.
Measuring tape: For taking actual measurements of existing items or spaces.
Drawing paper/cardboard: The surface on which the drawing is made.

Steps in Drawing a Simple Upholstery Project

The following are general steps for drawing a simple upholstery project:

Understanding the Project: Clearly understand what article is to be made (e.g., a simple stool, cushion).
Taking Measurements: Measure the actual dimensions if replicating an existing item, or decide on desired dimensions for a new design.
Selecting Scale: Choose an appropriate scale to fit the drawing on the paper (e.g., 1:1, 1:2).
Sketching: Lightly sketch the basic outline of the article.
Detailing: Add specific details, curves, and joinery points.
Dimensioning: Add all necessary dimensions to the drawing.

Layout of Project Drawing

Layout refers to the arrangement of different views (e.g., front, side, top) and details on the drawing sheet. A good layout ensures clarity and ease of understanding.

The following are considerations for layout:

Use a title block to include project name, date, scale, and designer.
Arrange views logically, typically with the front view central, top view above, and side view to the right.
Leave adequate space between different views and around the drawing for dimensions and notes.

Interpreting Dimensions on Drawing

Interpreting dimensions means understanding the numerical values and symbols on a drawing that indicate the size, length, width, height, and other measurements of the upholstery article.

The following are key points for interpreting dimensions:

Reading Numbers: Identify the numerical value (e.g., 45cm, 600mm).
Understanding Units: Note the units of measurement (e.g., cm, mm, inches).
Dimension Lines: These lines show the extent of the dimension.
Extension Lines: These lines extend from the object to the dimension line.
Arrowheads: Indicate the start and end of a dimension.
Scale: Remember that the drawing is often a scaled representation, and dimensions refer to the actual size.

Preparing Drawing for Construction

Preparing a drawing for construction involves ensuring all necessary information is present and clear for the craftsperson to build the article.

The following are steps in preparing a drawing for construction:

Final Review: Check all dimensions, lines, and details for accuracy and completeness.
Adding Notes: Include any specific instructions, material specifications, or assembly details.
Clear Labelling: Ensure all parts are clearly labelled.
Approval: Get the drawing approved by a supervisor or client if required.
Reproduction: Make copies of the final drawing for the workshop.

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils and reviews the previous lesson briefly. The teacher then asks pupils how engineers or builders know what to construct before they start building. This leads to the idea of a plan or drawing. The teacher introduces the topic: “Construction of a Simple Upholstery Article” focusing on drawing.
Pupils’ Activity: Pupils respond to questions and listen attentively, relating their answers to the new topic.
Learning Point: Pupils recall previous knowledge and are introduced to the lesson’s topic.

Step 2: Explanation of Project Drawing and Tools

Time: 7 minutes
Teaching Skill: Explanation/Lecture
Teacher’s Activity: The teacher defines project drawing in upholstery and explains its importance. The teacher then displays various drawing tools (drawing board, pencils, ruler, eraser) and explains their uses, demonstrating how to hold and use them correctly.
Pupils’ Activity: Pupils listen, observe the demonstration, and ask questions for clarification.
Learning Point: Pupils understand what project drawing is and identify the tools used.

Step 3: Demonstration of Drawing Layout

Time: 10 minutes
Teaching Skill: Demonstration/Modelling
Teacher’s Activity: Using the drawing board and tools, the teacher demonstrates how to lay out a simple upholstery project drawing (e.g., a simple square cushion or stool frame). The teacher shows how to sketch outlines, add main features, and arrange different views on the paper. The teacher also explains the concept of scale.
Pupils’ Activity: Pupils observe the teacher’s demonstration carefully, taking notes on the steps shown.
Learning Point: Pupils learn the practical steps for laying out a basic project drawing.

Step 4: Practice Drawing Layout

Time: 10 minutes
Teaching Skill: Guided Practice
Teacher’s Activity: The teacher distributes drawing materials (if available) or asks pupils to practice sketching on their notebooks. The teacher provides a simple project idea and guides pupils through the initial steps of laying out a drawing, offering individual assistance and correction.
Pupils’ Activity: Pupils attempt to reproduce a simple drawing layout, applying the techniques demonstrated by the teacher. They ask for help when needed.
Learning Point: Pupils gain hands-on experience in drawing layout and develop their drawing skills.

Step 5: Explanation of Interpreting Dimensions

Time: 5 minutes
Teaching Skill: Explanation/Discussion
Teacher’s Activity: The teacher uses the sample project plan/drawing to explain how to interpret dimensions. The teacher points out dimension lines, extension lines, arrowheads, and numerical values, emphasizing the importance of understanding units and scale.
Pupils’ Activity: Pupils observe the sample drawing and participate in a discussion on how to read and understand dimensions.
Learning Point: Pupils learn to correctly interpret dimensions on a technical drawing.

Step 6: Explanation of Preparing Drawing for Construction

Time: 3 minutes
Teaching Skill: Explanation
Teacher’s Activity: The teacher explains the final steps in preparing a drawing for construction, including final review, adding specific notes, clear labelling, and making copies. The teacher stresses that a well-prepared drawing prevents errors during construction.
Pupils’ Activity: Pupils listen and understand the importance of thorough preparation of drawings.
Learning Point: Pupils understand what makes a drawing ready for actual construction.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

What is project drawing in upholstery?
Mention three tools used for upholstery project drawing.
State two important steps in laying out a project drawing.
Explain how to interpret a dimension of “60cm” on a drawing.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 3 minutes
Teaching Skill: Summarization/Assignment
Teacher’s Activity: The teacher summarizes the key points of the lesson, reiterating the importance of accurate drawing for upholstery construction. The teacher assigns homework: pupils should draw a simple plan for a small stool or cushion, including basic dimensions, in their notebooks.
Pupils’ Activity: Pupils listen to the summary and copy down the homework.
Learning Point: Pupils consolidate their learning and apply it through homework.

Lesson Keywords

Project Drawing – A technical drawing or plan of an item to be constructed.
Layout – The arrangement of different views and details on a drawing sheet.
Dimensions – Numerical values indicating the size (length, width, height) of an object.
Scale – The ratio between the measurements on a drawing and the actual measurements of the object.
Interpretation – The process of understanding the meaning of symbols and numbers on a drawing.

Differentiation

For pupils who grasp concepts quickly, the teacher can encourage them to draw a more complex upholstery article or explore different scales. For those who need more support, the teacher will provide simplified drawing exercises and more one-on-one guidance.

Note for teachers using this lesson plan

Ensure that actual drawing materials are available for pupils to practice. Emphasize the connection between accurate drawing and successful upholstery construction. Encourage pupils to ask questions and provide ample opportunity for hands-on practice.