Class: Senior Secondary School 1 (SS 1)
Term: 1st Term
Week: 10
Age: 15 years
Duration: 45 minutes
Subject: Block Laying, Brick Laying and Concrete Work
Curriculum Theme: Entrepreneurship (Trade Subjects)
Previous Lesson: Site Preparation Tools and Leveling Techniques.
Topic: SETTING OUT
Subject Matter: methods of setting out, soil and site investigation, setting out tools and materials

Specific Objectives

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

Cognitive Domain:

Define setting out.
List at least three methods of setting out.
Identify common tools and materials used for setting out.
Explain the importance of soil and site investigation before setting out.

Affective Domain:

Appreciate the importance of accurate setting out in construction.
Show interest in learning practical skills related to building construction.

Psychomotor Domain:

Participate in a simple demonstration of setting out a rectangular foundation.
Handle basic setting out tools correctly.

Work cooperatively with peers during practical activities.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Technology Education.
State Unified Scheme of Work for Block Laying, Brick Laying and Concrete Work (SS 1).
Basic Building Construction for Senior Secondary Schools.

Instructional Materials

The teacher will teach this lesson with the aid of:

Measuring tape
Ranging rods
Builder’s line
Pegs/stakes
Hammer
Spirit level
Builder’s square
Chalk
A simple site plan/drawing

Rationale for the Lesson

This lesson helps pupils understand the initial and critical step in any construction project. Accurate setting out ensures that a building is constructed in the correct position and to the right dimensions, preventing costly errors later. It also introduces pupils to practical skills essential in the building industry.

Prerequisite/Previous Knowledge

Pupils should have basic knowledge of measurements, geometric shapes, and common building materials.

Lesson Content/Board Summary

SETTING OUT

Definition of Setting Out

Setting out is the process of transferring the dimensions and layout of a proposed building from the site plan or drawing onto the actual ground. It establishes the exact position and size of the foundation, walls, and other structural elements.

Importance of Setting Out

Accurate setting out is important for the following reasons:

It ensures the building is constructed in the correct position on the site.
It prevents errors in the dimensions and alignment of the building.
It guides the excavation and construction of foundations.
It helps to avoid disputes with adjoining property owners.
It ensures structural stability and safety of the building.

Methods of Setting Out

The following are common methods of setting out:

**The 3-4-5 Method (Pythagorean Theorem):** Used to establish right angles (90 degrees) for square or rectangular foundations.
**The Diagonal Method:** Used to check the squareness of a rectangular layout by measuring the diagonals, which should be equal.
**The Profile Board Method:** Involves erecting profile boards with nails or lines to mark the exact outer dimensions of the foundation and walls.

Soil and Site Investigation

Soil and site investigation is the process of examining the ground conditions before any construction begins. It is important for the following reasons:

To determine the bearing capacity of the soil (how much weight it can support).
To identify the presence of groundwater or unstable soil conditions.
To detect any underground services like pipes or cables.
To determine the appropriate type and depth of foundation required.
To assess the topography and drainage of the site.

Setting Out Tools and Materials

The following are common tools and materials used for setting out:

**Measuring Tape:** For measuring distances.
**Ranging Rods:** Used for marking points and establishing straight lines.
**Builder’s Line/String:** Used to mark straight lines between pegs or ranging rods.
**Pegs/Stakes:** Driven into the ground to mark points or line intersections.
**Hammer:** For driving pegs into the ground.
**Spirit Level:** For checking horizontal and vertical levels.
**Builder’s Square:** To establish right angles.
**Chalk/Spray Paint:** For marking lines on the ground.
**Site Plan:** The drawing showing the layout and dimensions.

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, reviews the previous lesson briefly, and then asks pupils what they think is the very first step when someone wants to build a house on an empty plot of land. The teacher then introduces the topic “Setting Out” as this initial and important step.
Pupils’ Activity: Pupils respond to questions and listen attentively.
Learning Point: Pupils are introduced to the topic and its relevance.

Step 2: Definition of Setting Out

Time: 7 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher explains the definition of setting out, emphasizing that it involves transferring the building’s plan onto the ground. The teacher uses a simple diagram or drawing to illustrate this.
Pupils’ Activity: Pupils listen, ask questions for clarification, and take notes.
Learning Point: Pupils understand what setting out means.

Step 3: Methods of Setting Out

Time: 7 minutes
Teaching Skill: Illustration/Explanation
Teacher’s Activity: The teacher explains and illustrates different methods of setting out, focusing on the 3-4-5 method and the diagonal method for establishing square corners. The teacher can use a whiteboard to draw simple examples.
Pupils’ Activity: Pupils observe the illustrations, ask questions, and take notes.
Learning Point: Pupils learn different techniques used for setting out.

Step 4: Soil and Site Investigation

Time: 7 minutes
Teaching Skill: Explanation/Discussion
Teacher’s Activity: The teacher explains the importance of investigating the soil and site conditions before setting out. The teacher discusses factors like soil type, water table, and existing services that can affect construction.
Pupils’ Activity: Pupils contribute to the discussion and understand why site investigation is necessary.
Learning Point: Pupils understand the preliminary steps before actual construction.

Step 5: Setting Out Tools and Materials

Time: 7 minutes
Teaching Skill: Demonstration/Identification
Teacher’s Activity: The teacher displays the actual setting out tools (or pictures if actual tools are unavailable) and explains the name and function of each tool and material. The teacher demonstrates how some tools are used.
Pupils’ Activity: Pupils observe the tools, identify them, and ask questions about their uses.
Learning Point: Pupils identify and know the function of various setting out tools.

Step 6: Practical Demonstration/Application

Time: 5 minutes
Teaching Skill: Practical Demonstration
Teacher’s Activity: The teacher, with assistance from some pupils, performs a simplified demonstration of setting out a small rectangular area on the school field or a designated space using some of the tools discussed. This shows how lines are established and corners are squared.
Pupils’ Activity: Pupils observe the demonstration, and some may participate under guidance.
Learning Point: Pupils see a practical application of setting out principles.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

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

Define “setting out.”
Mention three methods used for setting out a building.
List four tools and materials required for setting out.
State two reasons why soil and site investigation is important before construction.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 2 minutes
Teaching Skill: Summarization/Assignment
Teacher’s Activity: The teacher summarizes the key points of the lesson, reiterating the importance of accurate setting out. The teacher then gives pupils an assignment: “Draw a simple diagram showing how the 3-4-5 method is used to establish a right angle.”
Pupils’ Activity: Pupils listen to the summary and copy the assignment.
Learning Point: Pupils consolidate their learning and receive homework.

Lesson Keywords

Setting out – The process of transferring a building plan onto the ground.
Ranging rod – A pole used to mark points or establish straight lines.
Peg – A small stake driven into the ground to mark positions.
Builder’s line – A string used to mark straight lines between points.
Site investigation – Examining ground conditions before construction.
3-4-5 Method – A technique using measurements 3, 4, and 5 to create a right angle.

Differentiation

For pupils who grasp concepts quickly, the teacher can ask them to research more advanced setting out techniques or different types of site investigations. For pupils who need more support, the teacher will provide simplified diagrams and offer more hands-on guidance during the demonstration.

Note for teachers using this lesson plan

Emphasize the practical nature of this topic. If possible, conduct the practical demonstration outdoors on a cleared space. Safety precautions should be observed when handling tools. Encourage pupils to relate the lesson to real-world construction projects they may have seen.