Class: Junior Secondary School 1 (JSS1, JSS 1)
Term: 3rd Term
Week: 4
Age: 12 years
Duration: 45 minutes
Subject: Basic Technology
Curriculum Theme: Basic Science and Technology
Previous Lesson: Woodwork Hand Tools, Driving Tools, Holding Devices, and Care and Maintenance.
Topic: METALWORK HAND TOOLS
Subject Matter: Measuring tools, Marking out tools, Holding devices, Care and maintenance of metalwork hand tools.

Specific Objectives

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

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 metalwork hand tools.
List three measuring tools and state one use for each.
Mention two marking out tools and their uses.
State two holding devices and how they are used.
Enumerate three ways to care for metalwork hand tools.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 2 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher summarizes the key points of the lesson, reiterating the importance of identifying, using, and caring for metalwork hand tools. The teacher assigns homework.
Pupils’ Activity: Pupils listen and copy the homework.
Learning Point: Pupils consolidate their learning and prepare for further study.

Home Task: Record two correct examples of METALWORK HAND TOOLS from the lesson or home environment and explain each in your own words.

Lesson Keywords

Steel Rule – A flat, linear measuring instrument.
Scriber – A sharp-pointed tool used for marking lines on metal.
Bench Vice – A mechanical device used to secure an object to allow work to be performed on it.
Measuring – The process of determining the size or quantity of something.
Marking Out – The process of transferring a design or dimensions onto a workpiece.
Holding Devices – Tools used to grip or secure workpieces.
Maintenance – The process of preserving a tool in good condition.

Differentiation

For pupils who grasp concepts quickly, they can be encouraged to research other types of metalwork tools. For those who need more support, the teacher will provide additional visual aids and guided practice with the actual tools.

Note for teachers using this lesson plan

Ensure that all demonstrations are done safely. Emphasize the safety precautions associated with handling metalwork tools. Encourage pupils to ask questions and participate actively in discussions and practical sessions.

Cognitive Domain:

Identify various metalwork measuring, marking out, and holding tools.
State the uses of different metalwork measuring, marking out, and holding tools.
List ways to care for and maintain metalwork hand tools.

Affective Domain:

Appreciate the importance of using the correct tool for specific tasks.
Value the need for proper care and maintenance of hand tools.

Psychomotor Domain:

Demonstrate the basic use of simple metalwork measuring tools like the steel rule.
Handle metalwork tools safely during practical activities.

Work cooperatively in groups to identify and discuss metalwork tools.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Basic Technology (JSS 1-3)
State Unified Scheme of Work for Basic Technology JSS 1
Basic Technology for Junior Secondary Schools Book 1 by E.O. Okoro
Online video on metalwork hand tools

Instructional Materials

The teacher will teach this lesson with the aid of:

Actual metalwork measuring tools (e.g., steel rule, try square, tape rule)
Actual metalwork marking out tools (e.g., scriber, centre punch)
Actual metalwork holding devices (e.g., bench vice, C-clamp)
Charts showing various metalwork hand tools
Video clips demonstrating the use and care of tools.

Rationale for the Lesson

This lesson helps pupils understand the basic tools used in metalwork. Knowing these tools and their uses is important for developing practical skills and working safely in technology-related fields. It also teaches them how to keep tools in good condition for longer use.

Prerequisite/Previous Knowledge

Pupils have a general understanding of simple hand tools used at home and in school.

Lesson Content/Board Summary

METALWORK HAND TOOLS

Introduction to Metalwork Hand Tools

Metalwork hand tools are instruments used manually to perform various operations in metal fabrication and processing. These tools help in measuring, marking, holding, cutting, and shaping metal.

1. Measuring Tools

Measuring tools are used to determine dimensions, angles, or distances on workpieces. They ensure accuracy in metalwork.

The following are examples of measuring tools and their uses:

Steel Rule: Used for linear measurements and marking short distances.
Tape Rule: Used for measuring longer distances and curved surfaces.
Try Square: Used for checking squareness (90-degree angles) and marking lines at right angles to an edge.
Vernier Caliper: Used for precise measurements of internal, external, and depth dimensions.

2. Marking Out Tools

Marking out tools are used to transfer dimensions from a drawing onto a workpiece, indicating where material is to be removed or processed. They help to guide subsequent operations.

The following are examples of marking out tools and their uses:

Scriber: Used to scratch fine lines on metal surfaces for marking.
Punch (Centre punch, Dot punch): Used to make indentations for drilling (centre punch) or marking points (dot punch).
Divider: Used for scribing circles, arcs, and transferring distances.
Surface Gauge: Used for marking lines parallel to a surface plate and checking heights.

3. Holding Devices

Holding devices are used to securely hold workpieces during various metalwork operations like filing, drilling, or sawing. They provide stability and safety.

The following are examples of holding devices and their uses:

Bench Vice: Used to hold workpieces firmly on a workbench. It has fixed and movable jaws.
Hand Vice: A small vice used for holding small workpieces for filing, drilling, or other light operations.
C-Clamp: Used to hold workpieces together or to a workbench. It is shaped like the letter ‘C’.

4. Care and Maintenance of Metalwork Hand Tools

Proper care and maintenance extend the life of tools, ensure safety, and maintain accuracy in work.

The following are ways to care for metalwork hand tools:

Clean tools after use to remove dirt, oil, or metal filings.
Store tools in their designated places, preferably in toolboxes or racks, to prevent damage and loss.
Apply a thin film of oil or grease to metal parts to prevent rust.
Do not misuse tools; always use the right tool for the right job.
Regularly check tools for damage and repair or replace them as necessary.
Keep cutting edges of tools sharp and well-maintained.

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 briefly, and then introduces the new topic by asking pupils to name some tools they use at home or see around. The teacher then relates these to metalwork tools.
Pupils’ Activity: Pupils respond to questions and listen attentively.
Learning Point: Pupils are prepared for the new lesson and connect it to their prior knowledge.

Step 2: Identification and Uses of Measuring Tools

Time: 8 minutes
Teaching Skill: Demonstration/Explanation
Teacher’s Activity: The teacher displays various measuring tools (e.g., steel rule, try square, tape rule), names them, and explains their specific uses with practical demonstrations where possible. The teacher asks pupils to identify each tool.
Pupils’ Activity: Pupils observe the tools, identify them, and note their uses. They may practice simple measurements with a steel rule.
Learning Point: Pupils identify and state the uses of metalwork measuring tools.

Step 3: Identification and Uses of Marking Out Tools

Time: 8 minutes
Teaching Skill: Demonstration/Explanation
Teacher’s Activity: The teacher presents various marking out tools (e.g., scriber, centre punch, divider), names them, and demonstrates how they are used for marking on metal.
Pupils’ Activity: Pupils observe the tools and demonstrations, identify the tools, and state their uses.
Learning Point: Pupils identify and state the uses of metalwork marking out tools.

Step 4: Identification and Uses of Holding Devices

Time: 8 minutes
Teaching Skill: Demonstration/Explanation
Teacher’s Activity: The teacher displays different holding devices (e.g., bench vice, C-clamp), names them, and demonstrates how they are used to secure workpieces.
Pupils’ Activity: Pupils observe the tools and demonstrations, identify the tools, and state their uses.
Learning Point: Pupils identify and state the uses of metalwork holding devices.

Step 5: Discussion on Care and Maintenance of Tools

Time: 6 minutes
Teaching Skill: Discussion/Explanation
Teacher’s Activity: The teacher leads a discussion on why it is important to care for tools. The teacher explains and lists various ways to care for and maintain metalwork hand tools, emphasizing safety and longevity.
Pupils’ Activity: Pupils contribute ideas, listen, and note down the points discussed.
Learning Point: Pupils understand the importance of and methods for tool care and maintenance.

Step 6: Practical Activity/Reinforcement

Time: 5 minutes
Teaching Skill: Practical Application
Teacher’s Activity: The teacher guides pupils to handle and briefly demonstrate the use of some of the tools (e.g., measuring with a steel rule, tightening a C-clamp).
Pupils’ Activity: Pupils participate in the practical activity under the teacher’s supervision.
Learning Point: Pupils gain practical experience in handling and using basic tools.