Class: Junior Secondary School 3 (JSS3, JSS 3)
Term: 2nd Term
Week: 9
Age: 14 years
Duration: 45 minutes
Subject: Basic Science And Technology
Curriculum Theme: Basic Science
Previous Lesson: Magnetism, Lodestone and Laws of Magnetism
Topic: Electrical Energy
Subject Matter: Flows of electrons, Circuits series and parallel, Fuses and circuit breaker, Electrical meter reading and billing

Specific Objectives

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

Cognitive Domain:
(a) Explain the flow of electrons in an electric circuit.
(b) Distinguish between series and parallel circuits.
(c) Describe the functions of fuses, circuit breakers, and electric meters.
Affective Domain:
(a) Show concern for safety in the use of electrical appliances.
Psychomotor Domain:
(a) Construct simple series and parallel circuits correctly.
Social Domain:
(a) Participate actively and cooperate with classmates during practical activities.

Reference Materials

The following resources was used in planning this lesson:

9 Years Basic Education Curriculum
Lagos State Unified Scheme of work for Junior Secondary Schools
Wikipedia – Electrical energy
Relevant Textbooks

Instructional Materials

The teacher will teach this lesson with the aid of:

Dry cell batteries
Connecting wires
Bulbs and bulb holders
Switch
Charts showing series and parallel circuits
Fuse wire and circuit breaker models
Electric meter model

Rationale for the Lesson

This lesson helps pupils understand how electrical energy works, how it is controlled, measured, and used safely in homes and industries.

Prerequisite/Previous Knowledge

Pupils are familiar with the concept of energy and have seen or used electrical appliances at home and in school.

Lesson Content/Board Summary

Electrical Energy

Flow of Electrons

Electrical energy is produced by the movement of electrons through a conductor. Electrons are negatively charged particles that move when there is a potential difference between two points in a circuit.

The following are key points about electron flow:

Electrons move from the negative terminal to the positive terminal.
The movement of electrons produces electric current.
A closed circuit is required for electrons to flow.

Series and Parallel Circuits

An electric circuit is a complete path through which electric current flows. Components can be connected in different ways to form series or parallel circuits.

These include:

Series circuit: Components are connected end-to-end and the same current flows through all components.
Parallel circuit: Components are connected on separate branches and each branch receives the same voltage.

Fuses and Circuit Breakers

Fuses and circuit breakers are safety devices used to protect electrical circuits from damage due to excess current.

They are:

Fuse: A thin wire that melts when excessive current flows, breaking the circuit.
Circuit breaker: A switch that automatically turns off the circuit when current is too high.

Electrical Meter Reading and Billing

An electrical meter measures the amount of electrical energy consumed in homes and industries over a period of time.

The following are involved in meter reading and billing:

Electrical energy is measured in kilowatt-hours (kWh).
Meter readings show the units of energy consumed.
Electricity bills are calculated based on the units used.

Teaching Methods/Instructional Techniques:

To deliver this lesson,the teacher will adopt the following methods: Lecture, Explanation, Demonstration, Discussion, Visual Aids, Group Work

Instructional Procedures

To deliver this lesson, the teacher will adopt the following steps:

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher asks pupils questions about electrical appliances they use at home and reviews the previous lesson briefly.
Pupils’ Activity: Pupils respond to questions and share experiences.
Learning Point: Electrical energy is commonly used in daily life.

Step 2: Flow of Electrons

Time: 8 minutes
Teaching Skill: Explanation
Teacher’s Activity: The teacher explains the flow of electrons in a conductor and defines electric current.
Pupils’ Activity: Pupils listen attentively and ask questions.
Learning Point: Electric current is the flow of electrons in a circuit.

Step 3: Series and Parallel Circuits

Time: 10 minutes
Teaching Skill: Demonstration
Teacher’s Activity: The teacher demonstrates series and parallel circuits using charts and materials.
Pupils’ Activity: Pupils observe and identify differences.
Learning Point: Circuits can be connected in series or parallel.

Step 4: Safety Devices in Circuits

Time: 7 minutes
Teaching Skill: Explanation
Teacher’s Activity: The teacher explains fuses and circuit breakers and their functions.
Pupils’ Activity: Pupils listen and take part in discussion.
Learning Point: Fuses and circuit breakers protect circuits from damage.

Step 5: Note-Taking

Time: 5 minutes
Teaching Skill: Chalkboard Summary
Teacher’s Activity: The teacher writes the board summary and guides pupils to copy.
Pupils’ Activity: Pupils copy notes neatly.
Learning Point: Key concepts are summarized for retention.

Step 6: Evaluation/Review

Time: 5 minutes
Teaching Skill: Questioning
Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

What is electric current?
State one difference between series and parallel circuits.
Mention one function of a fuse.
Pupils’ Activity: Pupils answer questions orally.
Learning Point: Understanding of electrical energy is assessed.

Step 7: Conclusion

Time: 5 minutes
Teaching Skill: Reinforcement
Teacher’s Activity: The teacher summarizes the lesson and emphasizes safety in electricity use.
Pupils’ Activity: Pupils listen and respond.
Learning Point: Electrical energy must be used safely and responsibly.

Lesson Keywords

Electrical energy – energy produced by moving charges
Electron – a negatively charged particle
Circuit – a complete path for electric current
Fuse – a safety device that melts when current is too high
Kilowatt-hour – unit of electrical energy used

Differentiation

Use group work, visual aids, and practical demonstrations to support learners with different abilities.

Note for teachers using this lesson plan

Ensure safety precautions during demonstrations and relate concepts to real-life household electricity use.