Practical Exercise for SS 3

Class: SS 3
Term: First Term
Week: 11
Age: 16 years
Duration: 45 minutes
Subject: Basic Electricity
Previous Lesson: Electrical Appliances, Meaning and Classification
Topic: Practical
Subject Matter: Practical

Specific Objectives

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

Cognitive Domain

• Identify basic electrical components.
• Interpret simple circuit diagrams.
• State safety rules for practical electrical work.

Affective Domain

• Demonstrate careful handling of electrical equipment.
• Appreciate the importance of practical skills in electricity.
• Show teamwork during group practical activities.

Psychomotor Domain

• Connect components to form a simple electrical circuit.
• Take accurate voltage and current measurements in a circuit.
• Record observations systematically in a practical notebook.

Reference Materials

The following resources were used in planning this lesson:

• 2025 Revised 9 Years Basic Education Curriculum
• Relevant State Unified Scheme of Work
• Basic Electricity for Senior Secondary Schools textbook
• The HeadTeacher Scheme of work

Instructional Materials

The teacher will teach this lesson with the aid of:

• Assorted resistors
• Connecting wires
• Breadboard or circuit board
• DC power supply/battery pack
• Ammeter
• Voltmeter
• Multimeter
• Switch
• Circuit diagrams
• Practical notebooks

Rationale for the Lesson

This lesson is essential for developing hands-on skills in Basic Electricity, allowing students to apply theoretical knowledge to real-world circuits. Practical exercises reinforce understanding of electrical principles and prepare students for further studies and careers in electrical engineering and related fields. It also instills critical thinking and problem-solving abilities.

Prerequisite/Previous Knowledge

Students should have a basic understanding of electrical quantities (voltage, current, resistance), Ohm’s Law, series and parallel circuit connections, and common electrical symbols.

Lesson Content/Board Summary

Practical Exercise in Basic Electricity

Importance of Practical Exercises

Practical exercises in Basic Electricity are crucial for:

1. Reinforcing theoretical knowledge through hands-on application.
2. Developing practical skills in circuit construction and measurement.
3. Understanding the behaviour of electrical components in real circuits.
4. Enhancing problem-solving and analytical abilities.
5. Promoting safety awareness when working with electricity.

General Steps for Conducting an Electrical Practical

To successfully carry out an electrical practical, follow these steps:

1. Understand the Objective: Clearly know what the experiment aims to achieve or verify.
2. Identify Components: Recognize all components specified in the circuit diagram (e.g., resistors, batteries, meters, switches).
3. Interpret Circuit Diagram: Understand how components are connected (series, parallel) and where measurements should be taken.
4. Gather Materials: Collect all necessary components, tools, and measuring instruments.
5. Safety Precautions: Ensure the power supply is off before making connections. Handle components carefully.
6. Construct the Circuit: Connect the components accurately according to the circuit diagram using connecting wires and a breadboard or circuit board.
7. Check Connections: Double-check all connections to ensure they are firm and correct before applying power.
8. Take Measurements: Switch on the power supply and carefully take readings using appropriate meters (e.g., voltmeter for voltage, ammeter for current).
9. Record Observations: Write down all measurements and observations neatly in a practical notebook, often in a table format.
10. Analyse Data: Perform any necessary calculations and analyse the recorded data to draw conclusions.
11. Formulate Conclusion: State whether the objective of the experiment was met and explain the results.
12. Dismantle Circuit: Switch off the power supply and carefully disconnect the components.

Teaching Methods/Instructional Techniques

Discussion, Demonstration, Guided Practice, Practical Activity, Question and Answer, Explanation, Observation

Instructional Procedures

Step 1: Introduction

Time: 5 minutes

Teaching Skill: Explaining/Engaging

Teacher’s Activity: The teacher introduces the lesson by asking students about the importance of hands-on experience in learning electricity and briefly explains what a practical exercise entails. The teacher also highlights the safety rules for handling electrical components.

Pupils’ Activity: Students respond to questions and listen attentively to the introduction and safety rules.

Learning Point: Importance of practicals

Step 2: Component Identification and Diagram Interpretation

Time: 8 minutes

Teaching Skill: Demonstration/Identification

Teacher’s Activity: The teacher displays various electrical components (resistors, meters, switches) and a sample circuit diagram. The teacher guides students to identify each component and interpret its symbol and connection in the diagram.

Pupils’ Activity: Students identify components and interpret the circuit diagram, asking questions for clarification.

Learning Point: Component identification

Step 3: Circuit Construction Guidance

Time: 10 minutes

Teaching Skill: Guided Practice/Demonstration

Teacher’s Activity: The teacher demonstrates how to correctly connect components on a breadboard or circuit board according to a simple circuit diagram. The teacher emphasizes correct polarity and secure connections, ensuring the power supply is off during connection.

Pupils’ Activity: Students observe the demonstration and begin to practice connecting simple circuits under the teacher’s guidance.

Learning Point: Circuit connection techniques

Step 4: Taking Measurements

Time: 7 minutes

Teaching Skill: Demonstration/Supervision

Teacher’s Activity: The teacher demonstrates how to correctly connect a voltmeter in parallel and an ammeter in series to measure voltage and current respectively. The teacher guides students on how to read the meters accurately.

Pupils’ Activity: Students pay attention to the measurement techniques and carefully connect meters to their circuits to take readings.

Learning Point: Measurement procedures

Step 5: Recording Observations and Data Analysis

Time: 5 minutes

Teaching Skill: Instruction/Guidance

Teacher’s Activity: The teacher instructs students on how to record their measurements and observations systematically in their practical notebooks, possibly using a table. The teacher also explains how to perform basic calculations or analysis based on the data.

Pupils’ Activity: Students record their observations and begin to analyse their data as instructed.

Learning Point: Data recording and analysis

Step 6: Conclusion Drawing

Time: 2 minutes

Teaching Skill: Summarizing

Teacher’s Activity: The teacher guides students to draw a conclusion based on their observations and analysis, relating it back to the objective of the practical exercise.

Pupils’ Activity: Students attempt to formulate a conclusion for their practical work.

Learning Point: Drawing practical conclusions

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

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

1. What is the first thing to do before connecting any circuit?
2. How do you connect an ammeter to measure current in a circuit?
3. Mention two safety precautions to observe during an electrical practical.
4. Why is it important to record your observations accurately?

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Practical skills assessment

Step 8: Note-Taking

Time: 4 minutes

Teaching Skill: Guided Writing

Teacher’s Activity: The teacher guides pupils/students to copy the essential Board Summary notes on the general steps for conducting an electrical practical into their notebooks.

Pupils’ Activity: Pupils/students copy the notes carefully into their notebooks.

Learning Point: Practical methodology notes

Step 9: Conclusion

The teacher briefly reinforces the importance of practical work in Basic Electricity and encourages students to continue practising their circuit construction and measurement skills. The teacher also reminds them to always prioritize safety.

Continuous Assessment/Further Study

Type: Practical Report/Homework

Instruction: Students should complete a detailed practical report for the exercise conducted in class, including the objective, materials, procedure, observations (with table), calculations, and conclusion. They should also research common errors in practical electrical work and how to avoid them.

1. Prepare a practical report for today’s exercise.
2. List three common errors made during electrical practicals.
3. Suggest ways to prevent these errors.

Lesson Keywords

• Circuit – A closed path through which electric current can flow.
• Voltmeter – An instrument used to measure electric potential difference between two points in a circuit.
• Ammeter – An instrument used to measure electric current in a circuit.
• Resistor – An electrical component that limits or regulates the flow of electrical current in an electronic circuit.
• Breadboard – A construction base used for prototyping of electronics.

Differentiation

For learners who struggle, the teacher should provide simplified circuit diagrams and offer more one-on-one guidance during circuit construction and measurement. Faster learners can be challenged with more complex circuit diagrams or asked to investigate the effect of changing component values on circuit behaviour.

Suggested Lesson Videos

Search on YouTube for:

• “Basic electricity practical for SS3”
• “How to connect simple circuits”
• “Using a multimeter for beginners”

Teacher Guide for Using This Lesson Plan

Before the lesson, ensure all practical materials are prepared and tested. Set up a demonstration station where you can show component identification, circuit construction, and meter usage clearly. Emphasize safety rules at the beginning and throughout the practical session. Circulate among students during the practical activity to provide individual guidance, correct errors, and ensure accurate measurements. Encourage students to work collaboratively but also to understand each step individually. Remind students to copy the Board Summary notes on the practical methodology after the main activity and before the conclusion. Check for understanding by asking questions and reviewing their practical work.