Class: Junior Secondary School 3 (JSS3, JSS 3)
Term: 1st Term
Week: 2
Age: 14 years
Duration: 45 minutes
Subject: Basic Science And Technology
Curriculum Theme: Basic Technology
Previous Lesson: Career Prospect and Opportunities in Technology
Topic: Processing Of Wood (Part 1)
Subject Matter: Concept of wood processing: Growth of trees, Felling of trees.

Specific Objectives

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

Cognitive Domain:
(a) Explain the concept of wood processing.
(b) Describe the stages of tree growth and felling in wood processing.
Affective Domain:
(a) Appreciate the importance of proper tree felling methods in environmental conservation.
Psychomotor Domain:
(a) Identify tools used in felling trees through demonstration or pictures.
Social Domain:
(a) Work collaboratively in groups to discuss the importance of wood processing in society.

Reference Materials

The following resources was used in planning this lesson:

9 Years Basic Education Curriculum
Lagos State Unified Scheme of work for Junior Secondary Schools
Wikipedia- Wood processing
Relevant Textbooks

Instructional Materials

The teacher will teach this lesson with the aid of:

Charts showing stages of tree growth and felling
Pictures or videos of wood processing activities
Samples of wood at different stages of processing
Diagrams of tools used for tree felling (axe, saw, chainsaw)
Whiteboard and markers

Rationale for the Lesson

This lesson helps students understand how wood, a major construction and production material, is obtained and processed from trees through the stages of growth and felling.

Prerequisite/Previous Knowledge

Pupils have basic knowledge of trees and their uses from earlier classes and can identify trees as a source of raw material for furniture, paper, and building materials.

Lesson Content/Board Summary

Processing of Wood

Concept of Wood Processing

Wood processing is the method by which raw wood from trees is converted into useful materials for building, furniture, and other products. It involves several stages starting from the growth of trees to the final use of wood.

The following are major stages in wood processing:

Growth of trees.
Felling of trees.
Conversion of logs to lumber.
Seasoning and preservation.
Grading and finishing.

This lesson focuses on the first two stages — growth of trees and felling of trees.

Growth of Trees

The growth of trees refers to the natural development of trees from seeds into mature plants suitable for felling and processing. The process of tree growth takes several years, depending on the species and environmental conditions.

The following are stages in the growth of trees:

Seed germination: The seed absorbs water and begins to sprout.
Seedling stage: The young plant grows leaves and roots.
Sapling stage: The tree develops a stronger stem and begins to grow taller.
Mature stage: The tree has a thick trunk and branches, ready for felling and processing.

Healthy tree growth requires sunlight, water, nutrients from soil, and good air conditions.

Felling of Trees

Felling of trees is the process of cutting down mature trees for industrial and domestic use. It marks the beginning of wood harvesting and must be done carefully to ensure safety and environmental protection.

The following are important points about tree felling:

Trees should be mature before felling.
Tools such as axe, saw, or chainsaw are used for cutting.
Safety gear like gloves, boots, and helmets should be worn during felling.
Trees must be cut in a specific direction to avoid damage to property or injury.
After felling, replanting new trees is encouraged to replace the harvested ones.

Proper felling ensures sustainable forest use and prevents deforestation.

Teaching Methods/Instructional Techniques:

Lecture, Discussion, Explanation, Demonstration, Visual Aids, Group Work, Question and Answer

Instructional Procedures

To deliver this lesson, the teacher will adopt the following steps:

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher begins by showing pictures of trees and wooden products, asking pupils where the wood comes from. The teacher connects their responses to wood processing.
Pupils’ Activity: Pupils respond to questions and mention items made from wood.
Learning Point: Pupils develop interest and curiosity about how wood is obtained from trees.

Step 2: Concept of Wood Processing

Time: 7 minutes
Teaching Skill: Explanation
Teacher’s Activity: The teacher explains the meaning of wood processing and lists its main stages.
Pupils’ Activity: Pupils listen, ask questions, and take notes.
Learning Point: Pupils understand the concept and stages involved in wood processing.

Step 3: Growth of Trees

Time: 10 minutes
Teaching Skill: Discussion
Teacher’s Activity: The teacher explains the stages of tree growth using charts and emphasizes conditions needed for healthy growth.
Pupils’ Activity: Pupils observe charts, identify growth stages, and ask questions.
Learning Point: Pupils learn how trees develop before they are ready for felling.

Step 4: Felling of Trees

Time: 10 minutes
Teaching Skill: Demonstration
Teacher’s Activity: The teacher shows pictures or videos of felling operations and identifies tools used in felling.
Pupils’ Activity: Pupils identify tools and describe safety precautions during felling.
Learning Point: Pupils understand the process, tools, and precautions in felling trees.

Step 5: Note-Taking

Time: 5 minutes
Teaching Skill: Explanation
Teacher’s Activity: The teacher dictates or writes the board summary for pupils to copy into their notebooks.
Pupils’ Activity: Pupils write down the note.
Learning Point: Pupils have a written record of key points from the lesson.

Step 6: Evaluation/Review

Time: 5 minutes
Teaching Skill: Questioning
Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

What is wood processing?
List four stages in tree growth.
Mention three tools used for felling trees.
State two safety precautions during tree felling.
Why is replanting important after felling?
Pupils’ Activity: Pupils answer orally or in writing.
Learning Point: Pupils demonstrate understanding of wood processing, growth, and felling.

Step 7: Conclusion

Time: 3 minutes
Teaching Skill: Reinforcement
Teacher’s Activity: The teacher summarizes the lesson, highlights key points, and encourages pupils to appreciate sustainable forest use.
Pupils’ Activity: Pupils listen and ask final questions.
Learning Point: Pupils are motivated to protect the environment while understanding wood processing.

Lesson Keywords

Processing – converting raw materials into useful products
Felling – cutting down trees for use
Germination – process by which a seed starts to grow
Sustainability – maintaining balance by replacing what is used
Harvesting – collecting mature materials from nature for use

Differentiation

Teacher provides visual aids and real-life examples for average learners, simplified notes for slower learners, and advanced questions for fast learners.

Note for teachers using this lesson plan

Ensure pupils understand that responsible felling and replanting protect the environment. Use practical examples to link the lesson to real-life woodworking and forest management.