Class: Senior Secondary School 1 (SS1 / SSS 1)
Term: 3rd Term
Week: 9
Age: 15 years
Duration: 45 minutes
Subject: Machine Wood Work
Curriculum Theme: Technology
Previous Lesson: Wood Work Machine: Correct Operation And Machine Parts.
Topic: Wood work machine Parts, accessories, uses and maintenance of Cross cut, Circular saw, Surface planner, Thicknesses, Band saw
Subject Matter: Machine accessories, Reasons for maintenance, Types of maintenance

Specific Objectives

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

Cognitive Domain:

Define machine maintenance.
State at least three reasons for maintaining woodworking machines.
List three types of machine maintenance.
Identify at least four common accessories used with woodworking machines.

Affective Domain:

Appreciate the importance of regular machine maintenance for safety and longevity.
Develop a sense of responsibility towards caring for woodworking machines.

Psychomotor Domain:

Demonstrate basic cleaning procedures for a woodworking machine.
Properly identify and handle maintenance tools like an oil can and cleaning brush.

Work cooperatively in discussing the benefits of proper machine care.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Technology.
State Unified Scheme of Work for Senior Secondary Schools.
Basic Technology for Senior Secondary Schools, Book 1.
https://www.woodworkmagazine.com/machine-maintenance
https://www.safetysign.com/machine-safety

Instructional Materials

The teacher will teach this lesson with the aid of:

Charts showing different woodworking machines and their parts.
Pictures of various machine accessories.
An oil can.
A cleaning brush.
Examples of spare parts (e.g., a saw blade, planer knife).
A duster.
Whiteboard/blackboard and markers/chalk.

Rationale for the Lesson

This lesson helps pupils understand how to keep woodworking machines in good working order. Knowing about machine accessories and maintenance practices enables pupils to ensure their safety, prolong the life of expensive equipment, and produce quality work in the workshop.

Prerequisite/Previous Knowledge

Pupils are expected to have basic knowledge of different types of woodworking machines and their general functions from previous lessons.

Lesson Content/Board Summary

Maintenance of Woodwork Machines

Machine Accessories

These are extra parts or tools that assist the main machine in performing its functions effectively or enhance its operation.

Some common machine accessories for woodworking machines include:

Saw blades (for circular saws, band saws)
Planer knives/blades
Fences and guides
Push sticks and blocks
Wrenches and spanners
Dust collection systems
Lubricants (oil, grease)
Cleaning brushes

Definition of Maintenance

Maintenance refers to the process of keeping machines and equipment in good working condition to prevent breakdowns, ensure safety, and prolong their lifespan. It involves regular care, servicing, and repair to ensure optimal performance.

Reasons for Machine Maintenance

It is important to maintain woodworking machines for the following reasons:

To ensure the safety of the operator and other workshop users.
To prolong the lifespan of the machine, making it last longer.
To improve the efficiency and accuracy of the machine, leading to better work.
To prevent costly breakdowns and expensive repairs.
To ensure quality workmanship and produce good finished products.
To reduce overall operational costs in the long run.
To comply with safety regulations and standards in the workshop.

Types of Machine Maintenance

There are different types of maintenance performed on woodworking machines:

Preventive Maintenance: This involves regularly scheduled inspections and servicing to prevent potential problems before they occur. Examples include daily cleaning, lubrication, checking for loose parts, and sharpening blades.
Corrective Maintenance (Breakdown Maintenance): This is performed when a machine has already broken down or is not functioning correctly. It involves repairing or replacing faulty parts to restore the machine to working order.
Routine Maintenance: This includes simple, everyday tasks like cleaning the machine after use, tightening fasteners, and checking fluid levels, often performed by the machine operator.
Predictive Maintenance: This uses data and monitoring tools (like vibration analysis or oil analysis) to predict when a machine part might fail, allowing for maintenance to be scheduled before a breakdown occurs.

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 reviews the previous lesson briefly. The teacher then asks pupils what they think happens if a machine is not cared for properly, leading them to the topic of machine maintenance.
Pupils’ Activity: Pupils respond to questions and listen attentively.
Learning Point: Pupils recall previous knowledge and are introduced to the new topic.

Step 2: Machine Accessories

Time: 5 minutes
Teaching Skill: Explanation/Identification
Teacher’s Activity: The teacher displays pictures or actual examples of various machine accessories (e.g., saw blades, oil can, cleaning brush) and explains their roles. The teacher asks pupils to identify some accessories.
Pupils’ Activity: Pupils identify accessories and listen to explanations.
Learning Point: Pupils learn about common woodworking machine accessories.

Step 3: Definition of Maintenance

Time: 5 minutes
Teaching Skill: Definition/Elucidation
Teacher’s Activity: The teacher explains the meaning of “machine maintenance” and writes the definition on the board. The teacher asks pupils to define maintenance in their own words.
Pupils’ Activity: Pupils listen, define maintenance, and copy notes from the board.
Learning Point: Pupils understand the definition of machine maintenance.

Step 4: Reasons for Machine Maintenance

Time: 10 minutes
Teaching Skill: Explanation/Brainstorming
Teacher’s Activity: The teacher explains the various reasons why machine maintenance is important, emphasizing safety, machine longevity, and quality of work. The teacher encourages pupils to contribute more reasons.
Pupils’ Activity: Pupils listen, contribute ideas, and note down the reasons.
Learning Point: Pupils understand the benefits and necessity of maintaining machines.

Step 5: Types of Machine Maintenance

Time: 10 minutes
Teaching Skill: Explanation/Categorization
Teacher’s Activity: The teacher explains and differentiates between the various types of machine maintenance: preventive, corrective, routine, and predictive maintenance, giving practical examples for each.
Pupils’ Activity: Pupils listen, ask questions for clarity, and take notes.
Learning Point: Pupils learn about the different approaches to machine maintenance.

Step 6: Practical Demonstration

Time: 5 minutes
Teaching Skill: Demonstration/Application
Teacher’s Activity: Using the instructional materials (oil can, cleaning brush), the teacher briefly demonstrates simple routine maintenance tasks like oiling a moving part or cleaning a machine surface, emphasizing safety precautions.
Pupils’ Activity: Pupils observe the demonstration carefully and ask questions.
Learning Point: Pupils see practical application of maintenance procedures.

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 machine maintenance.
State three reasons why it is important to maintain woodworking machines.
List three types of machine maintenance.
Mention two common accessories used with woodworking machines.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 0 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher summarizes the key points of the lesson and assigns homework: “Research and write down five safety precautions to observe while carrying out maintenance on a circular saw.”
Pupils’ Activity: Pupils listen to the summary and copy the homework.
Learning Point: Pupils consolidate their learning and prepare for further study.

Lesson Keywords

Maintenance – The process of keeping machines in good working condition.
Accessories – Extra parts or tools that aid a machine’s function.
Preventive Maintenance – Scheduled servicing to prevent problems.
Corrective Maintenance – Repairs done after a breakdown.
Routine Maintenance – Everyday care like cleaning and oiling.
Lubricant – A substance (like oil or grease) used to reduce friction.

Differentiation

For pupils who grasp concepts quickly, the teacher can ask them to explain how lack of maintenance affects production quality. For those needing more support, the teacher can provide simplified notes or pair them with peers for discussion and clarification, focusing on identifying accessories and basic definitions.

Note for teachers using this lesson plan

Ensure that actual examples of maintenance tools and accessories are brought to class for a more practical and engaging demonstration. Emphasize safety precautions at all times during discussions and demonstrations related to machine handling and maintenance. Encourage pupils to ask questions and share any personal experiences with machine care.