Class: Senior Secondary School 1 (SSS 1)
Term: 3rd Term
Week: 1
Age: 15 years
Duration: 45 minutes
Subject: Carpentry And Joinery
Curriculum Theme: Entrepreneurship Trade Subjects
Previous Lesson: .
Topic: TIMBER PREPARATION – Sequence of Timber Preparation to Size
Subject Matter: steps in timber preparation, planing to flatness, sizing timber

Specific Objectives

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

Cognitive Domain:

Define timber preparation.
List the sequential steps involved in timber preparation to size.
Explain the importance of planing timber to flatness.

Affective Domain:

Appreciate the need for accuracy and precision in timber preparation.
Demonstrate safety consciousness while using hand tools like planes.

Psychomotor Domain:

Demonstrate the correct technique for planing timber to flatness.
Accurately size a piece of timber using appropriate tools.

Collaborate effectively when sharing tools and workspace during practical activities.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Senior Secondary Schools.
State Unified Scheme of Work for Carpentry and Joinery SSS 1.
Basic Woodwork for Senior Secondary Schools by E.A. Olaniyan.

Instructional Materials

The teacher will teach this lesson with the aid of:

Small timber pieces (rough and prepared).
Hand planes (e.g., jack plane, smoothing plane).
Workbenches with vises.
Measuring tapes or rules.
Try squares.
Marking gauges.
Pencils.
Safety goggles.

Rationale for the Lesson

This lesson helps pupils understand the fundamental process of preparing timber for various construction and furniture-making projects. Learning to prepare timber accurately ensures that finished products are strong, stable, and visually appealing, which is important for practical skills development.

Prerequisite/Previous Knowledge

Pupils have basic knowledge of different types of timber and common hand tools used in carpentry.

Lesson Content/Board Summary

TIMBER PREPARATION – Sequence of Timber Preparation to Size

Definition of Timber Preparation

Timber preparation involves the process of converting rough timber into usable, accurately dimensioned pieces suitable for construction, furniture making, or other woodworking projects. It ensures that the timber has flat surfaces, straight edges, and correct sizes.

Steps in Timber Preparation to Size

The following are the sequential steps in timber preparation:

Select Face Side: Identify the best wide surface of the timber, free from major defects. This will be the reference surface.
Plane Face Side: Plane the selected face side until it is perfectly flat.
Select Face Edge: Identify the best narrow edge adjacent to the face side.
Plane Face Edge: Plane the selected face edge until it is square to the face side and straight.
Mark Width: Use a marking gauge to mark the required width from the face edge on both ends and along the length.
Plane to Width: Plane down to the marked line to achieve the desired width.
Mark Thickness: Use a marking gauge to mark the required thickness from the face side on both ends and along the length.
Plane to Thickness: Plane down to the marked line to achieve the desired thickness.
Square Ends and Mark Length: Use a try square to square one end, mark the required length, and then square the second end.

Planing to Flatness

Planing to flatness involves removing irregularities from the timber surface until it is perfectly level and smooth. This is done by using a hand plane in a systematic manner, checking for flatness with a straightedge or try square across the surface in multiple directions.

Key points for planing to flatness:

Ensure the plane iron is sharp and correctly set.
Hold the plane firmly with both hands.
Push the plane across the timber, ensuring consistent pressure.
Check for flatness regularly using a straightedge or try square.
Work systematically across the entire surface.

Sizing Timber

Sizing timber refers to the process of reducing a piece of timber to its exact required dimensions (width, thickness, and length) after achieving flatness and squareness. This is done using marking out tools and planes or saws.

Steps for sizing timber:

Mark the desired width using a marking gauge from the face edge.
Plane or saw down to the marked width.
Mark the desired thickness using a marking gauge from the face side.
Plane or saw down to the marked thickness.
Mark and cut the required length after ensuring the ends are square.

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 introduces the new topic, “Timber Preparation – Sequence of Timber Preparation to Size,” by asking pupils about the importance of accurate measurements in carpentry.
Pupils’ Activity: Pupils respond to greetings and questions, and listen attentively to the introduction of the new topic.
Learning Point: Pupils recall previous knowledge and are introduced to the lesson topic.

Step 2: Explanation of Timber Preparation

Time: 8 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher defines timber preparation and explains its overall purpose in woodworking, emphasizing that it is the foundation for any good carpentry project. The teacher also shows examples of rough timber and prepared timber.
Pupils’ Activity: Pupils listen, take notes, and ask questions for clarification.
Learning Point: Pupils understand the definition and importance of timber preparation.

Step 3: Detailing Steps in Timber Preparation

Time: 10 minutes
Teaching Skill: Elucidation/Listing
Teacher’s Activity: The teacher explains each step in the sequence of timber preparation to size, starting from selecting the face side to squaring the ends. The teacher uses a prepared timber piece to illustrate each step.
Pupils’ Activity: Pupils observe the demonstration, take notes on the sequence, and ask questions.
Learning Point: Pupils can identify and understand the sequential steps involved in preparing timber.

Step 4: Demonstration of Planing to Flatness

Time: 8 minutes
Teaching Skill: Demonstration/Modelling
Teacher’s Activity: The teacher demonstrates the correct technique for planing a small piece of timber to flatness using a hand plane. The teacher emphasizes safety precautions and how to check for flatness.
Pupils’ Activity: Pupils observe the demonstration carefully, paying attention to the teacher’s technique and safety instructions.
Learning Point: Pupils observe the correct practical skill for planing timber to flatness.

Step 5: Practical Activity – Planing to Flatness

Time: 8 minutes
Teaching Skill: Guided Practice/Supervision
Teacher’s Activity: The teacher distributes small timber pieces and planes to pupils. The teacher supervises as pupils practice planing their timber pieces to flatness, providing individual guidance and correcting errors.
Pupils’ Activity: Pupils engage in the practical activity, attempting to plane their timber pieces to flatness under the teacher’s supervision.
Learning Point: Pupils develop practical skills in planing timber to flatness and apply safety measures.

Step 6: Explanation of Sizing Timber

Time: 6 minutes
Teaching Skill: Explanation/Instruction
Teacher’s Activity: The teacher explains how to accurately size timber after the face side and face edge have been prepared. The teacher demonstrates the use of marking gauges and measuring tapes to mark width and thickness.
Pupils’ Activity: Pupils listen, observe the demonstration of marking tools, and take notes.
Learning Point: Pupils understand the process and tools used for accurately sizing timber.

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 timber preparation.
List any three sequential steps in timber preparation to size.
Explain why it is important to plane the face side first.
What tools are used to mark the width and thickness of timber?

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
Teacher’s Activity: The teacher summarizes the key learning points of the lesson, reiterating the importance of accurate timber preparation. The teacher then gives homework, asking pupils to list the safety precautions when using a hand plane.
Pupils’ Activity: Pupils listen to the summary and note down the homework.
Learning Point: Pupils consolidate their understanding of the lesson.

Lesson Keywords

Timber Preparation – The process of converting rough timber into accurately dimensioned pieces.
Planing – The act of smoothing and flattening timber surfaces using a plane.
Sizing – Reducing timber to its exact required width, thickness, and length.
Face Side – The first selected, best wide surface of a timber piece, used as a reference.
Face Edge – The first selected, best narrow edge of a timber piece, planed square to the face side.

Differentiation

For visual learners, the teacher will use diagrams and demonstrate each step clearly. Kinesthetic learners will benefit from the practical hands-on activity of planing timber. Advanced pupils can be challenged to measure and mark more complex dimensions, while struggling pupils will receive one-on-one guidance during the practical session and be given simpler tasks to master.

Note for teachers using this lesson plan

Ensure all safety precautions are strictly followed during the practical session, especially when pupils are handling planes. Emphasize the importance of accuracy at every stage of timber preparation. Regular checks by the teacher are essential to guide pupils effectively.