Class: Senior Secondary School 2 (SS2 / SSS2)
Term: Third Term
Week: 2
Age: 16 years
Duration: 45 minutes
Subject: Basic Electricity
Curriculum Theme: Basic Electrical Installations
Previous Lesson: Wiring Regulations: I.E.E Regulation and Application of I.E.E Regulation.
Topic: HAND TOOLS AND TESTING IMPLEMENTS
Subject Matter: Meaning of hand tools and testing implements (definition), identification of hand tools (pliers, screwdrivers), identification of testing instruments (tester, multimeter), application of tools and testing instruments (electrical work).

Specific Objectives

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

Cognitive Domain:

Define hand tools and testing implements.
Identify various hand tools used in electrical work.
Identify common testing instruments used in electrical work.

Affective Domain:

Appreciate the importance of using appropriate tools for electrical tasks.
Develop an interest in safe practices when handling electrical tools and instruments.

Psychomotor Domain:

Demonstrate the correct handling of pliers and screwdrivers.
Demonstrate the basic use of a continuity tester and a multimeter.

Work collaboratively in identifying and discussing the applications of various tools.
Share knowledge on the proper and safe use of electrical hand tools and testing instruments.

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 by P.N. Okoro

Instructional Materials

The teacher will teach this lesson with the aid of:

Various types of pliers (e.g., combination pliers, long nose pliers, side cutting pliers)
Different types of screwdrivers (e.g., flathead, Phillips)
A continuity tester
A digital multimeter
Charts showing images of various hand tools and testing instruments.

Rationale for the Lesson

This lesson helps pupils understand and identify essential hand tools and testing implements used in basic electrical work. Knowledge of these tools and their correct applications is important for performing electrical tasks safely and effectively, and it prepares pupils for practical skills in electrical installations.

Prerequisite/Previous Knowledge

Pupils should have a basic understanding of electricity, electrical safety, and the importance of using appropriate tools for different tasks.

Lesson Content/Board Summary

HAND TOOLS AND TESTING IMPLEMENTS

Definition of Hand Tools and Testing Implements

Hand tools are devices operated manually without the aid of electric power, used to perform specific tasks such as cutting, bending, stripping, or fastening in electrical work. Testing implements are instruments used to measure electrical quantities or check for continuity, voltage, current, or resistance in electrical circuits and components.

Common Hand Tools in Electrical Work

The following are common hand tools used by electricians:

Pliers: These are gripping and cutting tools used for holding, bending, and cutting wires.
- Combination Pliers: Used for gripping, bending, and cutting wires.
- Long Nose Pliers: Used for reaching into tight spaces, bending small loops, and holding small wires.
- Side Cutting Pliers (Diagonal Cutters): Specifically designed for cutting wires.
Screwdrivers: These tools are used for tightening or loosening screws.
- Flathead (Slotted) Screwdriver: Has a flat tip, used for screws with a single slot.
- Phillips Screwdriver: Has a cross-shaped tip, used for screws with a cross-shaped recess.
- Pozidriv Screwdriver: Similar to Phillips but with extra slots, providing better grip.
Wire Strippers: Used to remove the insulation from electrical wires without damaging the conductor.
Measuring Tape: Used for measuring lengths and distances.
Hacksaw: Used for cutting conduit pipes and other metal materials.

Common Testing Instruments in Electrical Work

The following are common testing instruments used by electricians:

Continuity Tester: A simple device that checks if an electrical path exists between two points. It usually indicates continuity with a light or a buzzer.
Multimeter: A versatile electronic measuring instrument that combines several measurement functions in one unit. It can measure:
- Voltage (Voltmeter): Measures electrical potential difference in volts (V).
- Current (Ammeter): Measures the flow of electric charge in amperes (A).
- Resistance (Ohmmeter): Measures the opposition to current flow in ohms (Ω).
- Some multimeters can also measure continuity, frequency, capacitance, and temperature.
Test Lamp/Neon Tester: A simple tool used to detect the presence of voltage in a circuit.

Application of Tools and Testing Instruments in Electrical Work

Correct application of tools and testing instruments is essential for safety and efficiency:

Pliers are used for gripping, twisting, bending, and cutting wires during installation or repair.
Screwdrivers are used to fasten or unfasten screws on electrical fittings, switches, sockets, and appliance terminals.
Wire strippers are used to prepare wires for connections by removing the insulation.
Continuity testers are used to check if a wire or circuit path is complete (not broken) before applying power.
Multimeters are used for diagnostic purposes, such as checking for voltage in a circuit, measuring current draw, or testing the resistance of components like resistors or heating elements. They help identify faults and ensure circuits are operating correctly.

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 mention any tools they know that are used in electrical work or at home.
Pupils’ Activity: Pupils respond by mentioning various tools like hammers, screwdrivers, spanners.
Learning Point: Pupils recall prior knowledge related to tools and their uses.

Step 2: Meaning of Hand Tools and Testing Implements

Time: 8 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher defines hand tools and testing implements, explaining their general purpose in electrical work.
Pupils’ Activity: Pupils listen attentively and copy the definitions into their notebooks.
Learning Point: Pupils understand the basic definitions of hand tools and testing implements.

Step 3: Identification of Hand Tools

Time: 8 minutes
Teaching Skill: Demonstration/Identification
Teacher’s Activity: The teacher displays various hand tools (pliers, screwdrivers, wire strippers) and names them, explaining their specific uses and types.
Pupils’ Activity: Pupils observe the tools, identify them by name, and note down their uses.
Learning Point: Pupils can identify common hand tools used in electrical work.

Step 4: Identification of Testing Instruments

Time: 8 minutes
Teaching Skill: Demonstration/Identification
Teacher’s Activity: The teacher displays testing instruments (continuity tester, multimeter) and explains their functions and how to differentiate between them.
Pupils’ Activity: Pupils observe the instruments, identify them, and understand their primary functions.
Learning Point: Pupils can identify common testing instruments used in electrical work.

Step 5: Application of Hand Tools

Time: 8 minutes
Teaching Skill: Practical Demonstration
Teacher’s Activity: The teacher demonstrates the correct and safe application of pliers (e.g., cutting a wire, bending a wire) and screwdrivers (e.g., tightening a screw on a terminal) using practical examples.
Pupils’ Activity: Pupils observe the demonstrations carefully and ask questions for clarification.
Learning Point: Pupils learn the practical application and safe handling of hand tools.

Step 6: Application of Testing Instruments

Time: 5 minutes
Teaching Skill: Practical Demonstration
Teacher’s Activity: The teacher demonstrates the basic use of a continuity tester and a multimeter (e.g., checking for continuity, measuring voltage on a battery).
Pupils’ Activity: Pupils observe the demonstrations and understand how to use these instruments to test electrical parameters.
Learning Point: Pupils learn the basic practical application of testing instruments.

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 hand tools and testing implements.
Mention two types of pliers and state their uses.
State two types of screwdrivers.
Explain the function of a multimeter in electrical testing.

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/Assignment
Teacher’s Activity: The teacher summarizes the key points of the lesson and assigns homework: “Draw and label two hand tools and two testing instruments discussed in class.”
Pupils’ Activity: Pupils listen to the summary and copy down the homework.
Learning Point: The lesson is concluded with a recap and an assignment for reinforcement.

Lesson Keywords

Hand tools – Manually operated devices for tasks like cutting, bending, or fastening.
Testing implements – Instruments used to measure electrical quantities or check circuit conditions.
Pliers – Gripping and cutting tools.
Screwdrivers – Tools for tightening or loosening screws.
Continuity tester – Checks if an electrical path is complete.
Multimeter – Measures voltage, current, and resistance.

Differentiation

For pupils who grasp concepts quickly, the teacher can challenge them to identify additional specialized tools or explain more complex multimeter functions. For pupils who need more support, the teacher can provide simplified diagrams, allow peer-to-peer explanation, and offer extra time for hands-on practice with the tools.

Note for teachers using this lesson plan

Ensure that all tools and testing instruments used for demonstration are in good working condition and are handled safely. Emphasize electrical safety precautions throughout the lesson. Encourage pupils to ask questions and participate in identifying the tools.