Class: Senior Secondary School 1 (SS 1)
Term: Second Term
Week: 3
Age: 15 years
Duration: 45 minutes
Subject: Block Laying, Brick Laying and Concrete Work
Curriculum Theme: Entrepreneurship (Trade Subjects)
Previous Lesson: Building Foundation Purpose and Types.
Topic: BUILDING FOUNDATION FACTORS
Subject Matter: soil type, nature of soil, type of structure, proximity to existing structures

Specific Objectives

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

Cognitive Domain:

Define building foundation.
List the factors affecting the selection of a building foundation.
Explain each factor affecting foundation selection.

Affective Domain:

Appreciate the importance of considering these factors in building construction.
Participate actively in class discussions.

Psychomotor Domain:

Identify suitable foundation types based on given soil characteristics and structure type.

Collaborate effectively with peers during group activities.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Senior Secondary Schools.
State Unified Scheme of Work for Technical Vocational Education.
Building Construction for Senior Secondary Schools by A. A. Adeyemi.

Instructional Materials

The teacher will teach this lesson with the aid of:

Foundation charts showing different foundation types.
Various soil samples (e.g., sand, clay, loam).
Whiteboard and markers/chalk.

Rationale for the Lesson

This lesson helps pupils understand the basic principles behind selecting appropriate foundations for buildings. Knowing these factors is important for ensuring the stability and safety of structures, which is a fundamental aspect of building construction.

Prerequisite/Previous Knowledge

Pupils have a basic understanding of what a building is and some of its components.

Lesson Content/Board Summary

BUILDING FOUNDATION FACTORS

Definition of Building Foundation

A building foundation is the lowest part of a structure, usually below ground level, that transfers the load of the building to the soil.

Factors Affecting Foundation Selection

The following are factors that influence the choice of a building foundation:

Soil Type: This refers to the general classification of the soil, such as sandy soil, clayey soil, silty soil, or rocky soil. Different soil types have varying bearing capacities.
Nature of Soil: This involves the specific characteristics of the soil, including its strength, compressibility, water content, and potential for settlement. A soil’s nature determines how well it can support a structure.
Type of Structure: The kind of building being constructed, its size, height, and the total load it will impose on the ground significantly affect foundation choice. Heavy, multi-storey buildings require stronger foundations than light, single-storey ones.
Proximity to Existing Structures: If a new building is to be constructed close to an existing one, the foundation design must consider the potential impact on the existing structure’s foundation and stability.

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 asks them to identify the lowest part of any building they know. The teacher then relates their answers to the concept of a foundation.
Pupils’ Activity: Pupils respond to the teacher’s questions and share their ideas.
Learning Point: Pupils are introduced to the lesson topic and its relevance.

Step 2: Explanation of Building Foundation

Time: 5 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher defines a building foundation and explains its primary purpose using the foundation charts as visual aids.
Pupils’ Activity: Pupils listen attentively and ask questions for clarification.
Learning Point: Pupils understand what a building foundation is and its function.

Step 3: Introduction to Factors Affecting Foundation Selection

Time: 5 minutes
Teaching Skill: Brainstorming/Introduction
Teacher’s Activity: The teacher asks pupils to think about what might influence the choice of a foundation for a house, leading them to suggest various factors. The teacher then lists the main factors on the board.
Pupils’ Activity: Pupils brainstorm ideas and contribute to the discussion.
Learning Point: Pupils identify initial ideas about factors influencing foundation choice.

Step 4: Discussion of Soil Type and Nature of Soil

Time: 10 minutes
Teaching Skill: Demonstration/Explanation
Teacher’s Activity: The teacher displays various soil samples (sand, clay, loam) and explains how different soil types and their nature (e.g., bearing capacity, water content) affect foundation selection. The teacher uses examples to illustrate.
Pupils’ Activity: Pupils observe the soil samples, listen to the explanations, and ask questions.
Learning Point: Pupils understand how soil characteristics influence foundation design.

Step 5: Discussion of Type of Structure

Time: 5 minutes
Teaching Skill: Explanation/Questioning
Teacher’s Activity: The teacher explains how the size, weight, and intended use of a building (e.g., bungalow, skyscraper, bridge) determine the type and strength of the foundation required. The teacher asks pupils to give examples.
Pupils’ Activity: Pupils listen, answer questions, and provide examples of different structures.
Learning Point: Pupils grasp the relationship between building type and foundation choice.

Step 6: Discussion of Proximity to Existing Structures

Time: 5 minutes
Teaching Skill: Explanation/Illustration
Teacher’s Activity: The teacher explains why it is important to consider nearby buildings when designing a new foundation, highlighting issues like soil disturbance and potential settlement. The teacher can draw a simple diagram on the board.
Pupils’ Activity: Pupils listen to the explanation and observe the illustration.
Learning Point: Pupils understand the impact of adjacent structures on foundation design.

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 a building foundation?
Mention four factors that affect the selection of a building foundation.
Explain how ‘soil type’ influences foundation choice.
State one reason why considering the ‘type of structure’ is important for foundation selection.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 5 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher summarizes the key learning points of the lesson, emphasizing the importance of proper foundation selection for safe and durable buildings. The teacher then gives homework: “Research two different types of building foundations and describe where each would be suitable.”
Pupils’ Activity: Pupils listen to the summary and copy the homework.
Learning Point: Pupils consolidate their understanding and receive an assignment for further learning.

Lesson Keywords

Foundation – The lowest part of a structure that transfers the building’s load to the soil.
Soil Type – The classification of soil (e.g., sand, clay, rock) based on its composition.
Nature of Soil – The specific physical and mechanical properties of the soil, such as strength and water content.
Structure – A building or construction that is erected or built.
Proximity – The state of being near or close to something.

Differentiation

For pupils who grasp concepts quickly, the teacher can encourage them to research specific foundation types (e.g., strip, raft, pile) and their applications. For those needing more support, the teacher will provide simplified definitions and focus on identifying the main factors with visual aids and practical examples.

Note for teachers using this lesson plan

Encourage pupils to relate the lesson to real-life buildings in their community. Practical examples and visual aids, such as pictures or videos of different foundations, will enhance understanding. Ensure safety when handling soil samples, if applicable.