Class: Junior Secondary School 3 (JSS 3 / JS3)
Term: 3rd Term
Week: 6
Age: 14 years
Duration: 45 minutes
Subject: Basic Science and Technology
Curriculum Theme: Basic Science
Previous Lesson: Simple Machine: Definition.
Topic: PROCESSING OF CERAMICS AND GLASS
Subject Matter: Methods of ceramics and glass: Production of ceramics and glass

Specific Objectives

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

Cognitive Domain:

Define ceramics and glass.
State the raw materials used in the production of ceramics and glass.
Outline the production methods for ceramics and glass.

Affective Domain:

Appreciate the importance of ceramics and glass in daily life.
Show interest in the processes involved in producing these materials.

Psychomotor Domain:

Identify various products made from ceramics and glass.
Describe the basic steps in the production of ceramics and glass.

Discuss the uses of ceramics and glass in society.
Relate the production of ceramics and glass to local industries.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Basic Science and Technology (JSS 3).
State Unified Scheme of Work for Basic Science and Technology (JSS 3).
MacMillan Basic Science and Technology for Junior Secondary Schools Book 3.
https://www.education.gov.ng/curriculum
https://www.waecdirect.org/curriculum

Instructional Materials

The teacher will teach this lesson with the aid of:

Samples of ceramic products (e.g., plates, pottery, tiles).
Samples of glass products (e.g., bottles, window pane, glass cups).
Charts illustrating the production processes of ceramics and glass.

Rationale for the Lesson

This lesson helps pupils understand how common materials like ceramics and glass are made. It enables them to appreciate the science and technology behind these everyday items and their importance in various aspects of life and industry.

Prerequisite/Previous Knowledge

Pupils should have basic knowledge of different types of materials and their properties from previous lessons.

Lesson Content/Board Summary

PROCESSING OF CERAMICS AND GLASS

What are Ceramics?

Ceramics are inorganic, non-metallic materials formed by heating and cooling. They are typically made from clay and other natural materials.

The following are raw materials for ceramics:

Clay (e.g., kaolin)
Feldspar
Quartz (silica)
Water

Production of Ceramics

The production of ceramics involves several key steps:

Preparation of Raw Materials: Raw materials like clay are cleaned, crushed, and mixed with water to form a workable paste.
Forming: The clay mixture is shaped into desired forms using methods like molding, throwing (on a potter’s wheel), or pressing.
Drying: The formed ceramic piece is slowly dried to remove excess water, which prevents cracking during firing.
Firing (Baking): The dried piece is heated in a kiln at very high temperatures (over 1000°C). This process hardens the material and gives it strength.
Glazing: A glassy coating (glaze) can be applied to the fired ceramic and then re-fired to make it waterproof, smooth, and decorative.

What is Glass?

Glass is a hard, brittle, transparent or translucent material primarily made from sand (silica), which has been cooled from a molten state without crystallizing.

The following are raw materials for glass:

Silica sand (main component)
Soda ash (sodium carbonate)
Limestone (calcium carbonate)
Cullet (recycled glass)

Production of Glass

The production of glass involves the following steps:

Batching: The raw materials (silica sand, soda ash, limestone, cullet) are carefully measured and mixed together.
Melting: The batch mixture is heated in a furnace to very high temperatures (around 1500°C – 1700°C) until it melts into a liquid called molten glass.
Forming: The molten glass is then shaped into various products using methods such as blowing, pressing, drawing, or floating (for flat glass).
Annealing: The formed glass products are slowly cooled in a controlled manner to relieve internal stresses that could cause them to crack. This process strengthens the glass.

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 displays various ceramic and glass products and asks pupils to identify them and state their uses.
Pupils’ Activity: Pupils observe the items, identify them, and discuss their uses.
Learning Point: Pupils are introduced to the lesson topic and connect it to familiar objects.

Step 2: Definition of Ceramics and Raw Materials

Time: 8 minutes
Teaching Skill: Explanation/Questioning
Teacher’s Activity: The teacher defines ceramics and explains the primary raw materials used in their production, writing key points on the board.
Pupils’ Activity: Pupils listen attentively, ask questions for clarity, and copy notes from the board.
Learning Point: Pupils understand what ceramics are and their basic components.

Step 3: Production of Ceramics

Time: 8 minutes
Teaching Skill: Explanation/Demonstration
Teacher’s Activity: The teacher explains the step-by-step process of ceramic production, using a chart or diagrams to illustrate.
Pupils’ Activity: Pupils observe the illustrations, listen to the explanation, and ask questions about the process.
Learning Point: Pupils learn the stages involved in making ceramic products.

Step 4: Definition of Glass and Raw Materials

Time: 7 minutes
Teaching Skill: Explanation/Questioning
Teacher’s Activity: The teacher defines glass and explains the main raw materials used in its manufacture, noting them on the board.
Pupils’ Activity: Pupils listen, contribute examples of glass products, and write down the definitions and materials.
Learning Point: Pupils understand what glass is and its fundamental raw materials.

Step 5: Production of Glass

Time: 7 minutes
Teaching Skill: Explanation/Illustration
Teacher’s Activity: The teacher outlines the production process of glass, using visual aids like diagrams of a glass furnace or forming methods.
Pupils’ Activity: Pupils pay attention to the explanation, relate it to the diagrams, and take notes.
Learning Point: Pupils learn the different steps in manufacturing glass.

Step 6: Discussion on Uses and Importance

Time: 5 minutes
Teaching Skill: Discussion/Engagement
Teacher’s Activity: The teacher leads a brief discussion on the various uses and importance of both ceramic and glass products in daily life and industries.
Pupils’ Activity: Pupils actively participate, giving examples of uses and discussing the significance of these materials.
Learning Point: Pupils appreciate the practical applications and value of ceramics and glass.

Step 7: Evaluation/Review

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

What are ceramics?
List three raw materials used in making ceramics.
Mention any three steps involved in the production of ceramics.
Define glass.
State two raw materials for glass production.
Outline the main stages in the production of glass.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 1 minute
Teaching Skill: Summarization
Teacher’s Activity: The teacher briefly summarizes the main points of the lesson and assigns a short homework task.
Pupils’ Activity: Pupils listen to the summary and copy the homework assignment.
Learning Point: The lesson is concluded with a reinforcement of key concepts.

Lesson Keywords

Ceramics – Inorganic, non-metallic materials formed by heat.
Glass – Hard, brittle, transparent material made from molten sand.
Clay – A fine-grained natural earthy material that is plastic when wet.
Silica – A compound of silicon and oxygen, commonly found as sand.
Firing – The process of heating ceramic materials in a kiln to harden them.
Glazing – Applying a glassy coating to ceramics for decoration and waterproofing.
Annealing – Controlled slow cooling of glass to remove internal stresses.
Melting – Heating raw materials to a liquid state, as in glass production.

Differentiation

For pupils who are struggling, the teacher will provide simplified definitions and focus on identifying key raw materials and one or two main production steps. More advanced pupils will be encouraged to research different types of ceramics and glass and their specific applications.

Note for teachers using this lesson plan

Encourage pupils to bring in more examples of ceramic and glass products from their homes. Emphasize safety precautions in handling glass. If possible, show short video clips of ceramic or glass production processes to enhance understanding.