Thursday, 10 November 2011

Lesson 27

Lesson 27: Improvement Of Waste Disposal

Learning Objective

Understanding the effects of improper disposal of waste on the environment

Syllabus Correlations

· Theme: Investigating Materials

· Learning Area: Waste Management

· Learning Objective: Understanding the effects of improper disposal of waste on the environment

Learning Outcomes:

Pupils should be able to:

· describe how waste is disposed of in a local area.

· suggest ways to improve waste disposal.

Concept(s) Introduced:

· what is the process to dispose waste;

· ways to improve waste disposal.

Skills Covered:

· Observing, classifying, making inferences, interpreting data, making conclusions, comparing and contrasting.

Vocabulary/ New Words:

dispose, pollution, recycle, reuse, waste

Value(s) Incorporated:

· Having an interest in and curiosity about the environment.

· Being diligent and persevering.

· Realising that science is a means to understand nature.

· Thinking rationally

· Analysing the things around us

Materials Needed:


Point(s) to Note:

Explain how to dispose waste and improve waste disposal

Teaching Strategies

Set Induction

Show the videos on examples of improper waste disposal. Ask pupils what are the effects of such disposal to the environment. Teacher explains what happens when there is pollution specifically the occurrence global warming, acid rain and various diseases.

Component: Introduction

Step 1

Play the content component. Ask pupils whether they know where thrown waste go and what happens to waste collected. Ask pupils who is responsible for disposing waste in their respective housing areas. If the pupils do not know, encourage them to find out.

Play the content component. Teacher explains that municipal councils are responsible to dispose of waste. Ask students who the municipal council of Kuala Lumpur. Explain the responsibilities of DBKL. Encourage pupils to ensure that plastic bags ready for collection need to be tied up. Show video on how waste is collected.

Play the content component. Ask pupils whether they know what happens after waste are collected. Teacher highlights that there are two ways. One is that waste is sent to landfills. Ask pupils whether they know what happens at the landfills. Explain that garbage is compacted and covered with soil. Another way is to burn waste in incinerators. Explain that the burning is at high temperature and that an incinerator is sealed.

Play the content component. Ask pupils what should be done to improve waste disposal. Teacher gives a few examples like covering garbage bins, tie rubbish bags and separating waste.

Play the content component. Ask pupils what is biodegradable waste. Teacher explains what biodegradable waste is and how it can make soil more fertile. Highlight some ways to dispose waste properly such as empty all bottles before throwing, put loose rubbish in a rubbish bag and tie the bag firmly. Advice pupils not to put flammable substances in rubbish bag.

Play the content component. Ask pupils what is non-biodegradable product and to give examples. Teacher explains that reducing the use of non-biodegradable products help to reduce waste and protect environment. Encourage pupils to reuse materials to reduce waste.

Play the content component. Ask pupils what can be recycled and whether they have sent any waste for recycling. Teacher explains that the benefit of recycling is that new and useful materials can be produced. Recycling centres will buy waste. Encourage pupils to recycle as it preserves the environment.

Component: Content

Step 2

Play the activity component. Ask pupils to choose the answer being either improper or proper way to dispose waste. Tell pupils to observe the images well to complete the activity.

Component: Activity

Step 3

There are five questions in this component covering the learning outcomes. Questions 1 to 3 are objective questions. Q4 is a drag and drop activity. Pupils drag and drop the correct answers for the questions. Q5 consists of true or false questions. Pupils need to identify whether the statements are true or false.

Use evaluation sheets to assess the pupils’ understanding of this lesson.

Component: Evaluation

Step 4

A case study on water pollution. Ask pupils what water pollution is and whether they have witnessed such pollution before. Teacher explains how water pollution occurs. Ask pupils what is contained in water that makes it polluted. Ask pupils to discuss what are the consequences of polluted water, namely to mankind, aquatic plants and animals. Explain how polluted water can affect mankind through the consumption of aquatic animals like fish.

Component: Extension


Conclude the lesson by playing this component to further reinforce understanding of the lesson. Help pupils to know what happens to waste collected and how it is disposed of. Emphasise how to improve waste disposal.

Component : Summary

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