Class: Senior Secondary School 2 (SS2 / SSS2)
Term: 1st Term
Week: 6
Age: 16 years
Duration: 45 minutes
Subject: Basic Electricity
Curriculum Theme: Electrical Power Systems
Previous Lesson: Distribution of Electricity: Meaning, Layout and Components.
Topic: DISTRIBUTION OF ELECTRICITY
Subject Matter: Practical observation of electricity distribution network (real-life distribution facilities), identification of distribution components on site (transformers, feeders, poles)

Specific Objectives

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

Cognitive Domain:

Define electricity distribution.
Identify key components of an electricity distribution network.
Explain the function of a transformer in electricity distribution.

Affective Domain:

Appreciate the importance of electricity distribution networks in daily life.
Value the safety precautions associated with electrical infrastructure.
Show interest in practical observation and learning.

Psychomotor Domain:

Point out and name various components of the distribution network during a field observation.
Sketch simple diagrams of observed components like poles and transformers.

Collaborate with peers during observation and discussion.
Ask relevant questions to clarify understanding of the distribution network.

Reference Materials

The following resources were used in planning this lesson:

Senior Secondary Schools Education Curriculum
State Unified Scheme of Work
Basic Electricity for Senior Secondary Schools Textbook
https://www.phcn.com
https://www.nigerianelectricity.org

Instructional Materials

The teacher will teach this lesson with the aid of:

A nearby PHCN (or equivalent Disco) electricity distribution network accessible for safe observation.
Field trip materials such as notebooks, pens, and safety guidelines.
Charts or diagrams showing components of an electricity distribution network (for pre-trip briefing).

Rationale for the Lesson

This lesson helps pupils to understand how electricity reaches their homes and communities by observing real-life distribution networks. It enables them to identify important components and appreciate the practical application of electrical principles.

Prerequisite/Previous Knowledge

Pupils have a basic understanding of electricity, its generation, and transmission from previous lessons.

Lesson Content/Board Summary

DISTRIBUTION OF ELECTRICITY

Meaning of Electricity Distribution

Electricity distribution is the final stage in the delivery of electricity to end-users. It involves carrying electricity from the transmission system to individual consumers through a network of substations, feeders, and service lines.

Stages of Electricity Supply

The supply of electricity typically involves three main stages:

Generation: Production of electricity at power stations.
Transmission: Long-distance transport of high-voltage electricity from power stations to substations.
Distribution: Delivery of electricity from substations to consumers at lower voltages.

Key Components of an Electricity Distribution Network

The following are essential components observed in an electricity distribution network:

Transformers: Devices that step down high voltage electricity from the transmission lines to lower voltages suitable for consumers. They are often seen on poles or in substations.
Feeders (Distribution Lines): Overhead or underground cables that carry electricity from substations to various points within a community.
Poles: Wooden, concrete, or metal structures used to support overhead distribution lines and equipment like transformers and insulators.
Insulators: Materials (usually ceramic or glass) attached to poles to prevent electricity from flowing into the pole structure and to safely hold the live wires.
Service Lines: Smaller lines that branch off from feeders to deliver electricity directly to individual homes, offices, and other buildings.
Circuit Breakers/Fuses: Safety devices that automatically interrupt the flow of electricity in case of an overload or fault to protect the network and consumers.
Meters: Devices installed at consumer premises to measure the amount of electricity consumed.

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 on electricity transmission, and introduces the day’s topic: “Distribution of Electricity” and the planned practical observation.
Pupils’ Activity: Pupils respond to greetings, recall previous knowledge, and listen attentively to the introduction.
Learning Point: Pupils are prepared for the day’s lesson and understand its relevance.

Step 2: Pre-Observation Briefing and Safety

Time: 7 minutes
Teaching Skill: Explanation/Instruction
Teacher’s Activity: The teacher explains what pupils should look for during the observation, lists the key components to identify (transformers, poles, feeders), and emphasizes safety rules to be followed during the field trip (e.g., do not touch wires, keep a safe distance).
Pupils’ Activity: Pupils listen to the briefing, ask clarifying questions, and acknowledge the safety rules.
Learning Point: Pupils understand their task and the importance of safety.

Step 3: Movement to Observation Site

Time: 2 minutes
Teaching Skill: Management
Teacher’s Activity: The teacher leads the pupils safely to a designated observation point near a PHCN distribution network (e.g., a street with visible poles and transformers).
Pupils’ Activity: Pupils move orderly and quietly to the observation site.
Learning Point: Pupils are positioned to begin practical observation.

Step 4: Field Observation and Identification

Time: 15 minutes
Teaching Skill: Demonstration/Guidance
Teacher’s Activity: The teacher points out and identifies various components of the electricity distribution network, such as transformers, utility poles, distribution lines (feeders), and insulators, explaining their basic functions.
Pupils’ Activity: Pupils observe the components, identify them as pointed out by the teacher, and take notes or make simple sketches in their notebooks.
Learning Point: Pupils gain direct practical experience of electricity distribution components.

Step 5: On-Site Discussion and Question & Answer

Time: 8 minutes
Teaching Skill: Questioning/Facilitation
Teacher’s Activity: The teacher encourages pupils to ask questions about the observed components, clarifies their doubts, and initiates a brief discussion on the importance of the network and safety.
Pupils’ Activity: Pupils ask questions, contribute to the discussion, and listen to explanations.
Learning Point: Pupils deepen their understanding through interactive discussion and clarification.

Step 6: Movement Back to Class

Time: 2 minutes
Teaching Skill: Management
Teacher’s Activity: The teacher leads the pupils back to the classroom safely and orderly.
Pupils’ Activity: Pupils return to the classroom.
Learning Point: Pupils are ready for the review and evaluation phase of the lesson.

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 electricity distribution?
Mention three components of an electricity distribution network that you observed.
What is the main function of a transformer in electricity distribution?
Why is it important to maintain a safe distance from electrical poles and wires?

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
Teacher’s Activity: The teacher summarizes the key points of the lesson, reiterating the definition of electricity distribution and the main components observed. The teacher assigns homework: “Draw and label a simple diagram showing a utility pole with a transformer and distribution lines.”
Pupils’ Activity: Pupils listen to the summary and copy down the homework.
Learning Point: Pupils consolidate their learning and have an assigned task.

Lesson Keywords

Electricity – The flow of electric charge.
Distribution – The process of delivering electricity to consumers.
Transformer – A device that changes voltage levels.
Feeder – A main line carrying electricity from a substation.
Pole – A structure supporting overhead electrical lines.
Insulator – A material that prevents the flow of electricity.

Differentiation

For pupils who are struggling, the teacher will provide more direct guidance during the observation, pointing out components more explicitly and asking simpler, direct identification questions. Advanced pupils will be encouraged to ask more complex questions about the network’s operation, consider potential hazards, or research additional components beyond the basic ones identified.

Note for teachers using this lesson plan

Prior to this lesson, ensure a safe and accessible observation point for the electricity distribution network is identified. Obtain any necessary permissions and conduct a risk assessment. Emphasize safety throughout the lesson, especially during the outdoor observation. If a direct field trip is not feasible due to safety or accessibility, use detailed diagrams, videos, or virtual tours to achieve similar learning objectives.