Plants – Weeds (Unwanted Plants) | Identification and Meaning of Weeds | Importance of Weeds | Ways | of Protecting the Soil and Environment against Pollution Primary 4 (Basic 4)

Last Updated on December 26, 2020 by Alabi M. S.

 

 

GENERAL INFORMATION

BASIC SCIENCE

BASIC SCIENCE AND TECHNOLOGY 

SECOND TERM

WEEK 5

PRIMARY 4

THEME –  LEARNING ABOUT OUR ENVIRONMENT 

 PREVIOUS LESSON – Growing of Plants – Soil Preparation | Planting of Crops | Nurture and Care for the Plants Primary 4 (Basic 4)

 

TOPIC – PLANTS (WEEDS) 

 

LEARNING AREA

1. Introductory Activities

2. Identification and Meaning of Weeds

3. Importance of Weeds (Unwanted Plants)

4. Ways of Protecting the Soil and Environment against Pollution

 

PERFORMANCE OBJECTIVES

By the end of the lesson, the pupils should have attained the following objectives (cognitive, affective and psychomotor) and should be able to –

1. identify and define weeds.

2. state the importance of weeds.

3. list the control measures for weeds.

4. enumerate ways of protecting the soil and environment against pollution.

 

ENTRY BEHAVIOUR

Crops grown in a particular place.

 

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of:

School garden

Course book

Rubber gloves

Garden knife

Small hoe.

 

 

METHOD OF TEACHING

Choose a suitable and appropriate methods for the lessons.

Note – Irrespective of choosing methods of teaching, always introduce an activities that will arouse pupil’s interest or lead them to the lessons. 

 

REFERENCE MATERIALS

Scheme of Work

9 – Years Basic Education Curriculum

Course Book

All Relevant Material

Online Information

 

WRITING INSTRUCTIONS

Copy as I write or draw as I need. This instruction should be given when you need the pupils to write or draw.

 

CONTENT OF THE LESSON  

LESSON 1 – INTRODUCTION ACTIVITIES 

Teacher’s Activities – Take the pupils to the school’s garden for inspection, call their attention on the growing crops to identify other plants that are growing along and called them UNWANTED PLANTS.

Pupil’s activities and response – Take a walk to the school’s with the teacher, pay attention to him/her and identify plants growing along with the crops as unwanted.

Teacher’s remark – Unwanted plants are known as weed. Ask the pupils, what is weeds? Listen to their definition and give a cheer to quick response. Summary the meaning of weeds on the board.

 

On board, copy as I write.

MEANING OF WEEDS 

Weeds are the unwanted plants.

Weeds are plants that grow where they are not planted and wanted.

 

 

Weeds can be grasses, trees, herbs or crops.

 

IMPORTANCE OF WEEDS 

Teacher’s Activities – Ask the pupils, how can these weed be useful for man and animals. Give them a hints that will enable them to itemised the importance of weeds.

Pupil’s response to questions – Quick response to questions.

Teacher’s remark – Weeds can be grasses, trees, herbs or crops. They are very importance to mankind just as the crops. Itemised the points on the board and give a cheer for quick response to questions.

 

On board, copy as I write.

Weeds can be grasses, trees, herbs or crops.

Weeds are used for –

1. feeding animals.

2. making manure.

3. building houses and making furnitures.

4. firewood

5. support other plants growing, e.g. yam.

6. medication, e.g. herbs.

7. preserving crops.

8. checking erosion.

9. preserving crops.

10. for exchange.

11. some weeds are useful crops.

 

LESSON 2 – HOW CAN WEEDS BE CONTROLLED? 

Teacher’s Activities – Take the pupils back to the school’s garden to discuss the effects of weeds and recommend possible ways of controlling weeds.

Pupil’s response –

1. Cutting

2. Hoeing

3. Hand picking or uprooting.

4. Allow animals to feed on the weeds.

  • This is not recommended without proper controls.

5. The use of chemicals.

 

The above points are summarised as follows – 

1. Biological control

  • This is the used of insects and animals to feed on the weeds.

 

2. Cultural control

 

 

  • This involves picking or weeding.

 

3. Chemical control

  • This is the used of chemicals.

 

LESSON 3 – WAYS OF PROTECTING THE SOIL AND ENVIRONMENT FROM EROSION AND POLLUTION 

Teacher’s/Pupil’s Discussion on ways of protecting the soil and the environment from erosion.

Erosion is the wasting away of the top soil.

Government make laws to protect the soil and environment. And also, give proper public enlightenment campaign on –

1. Proper waste disposal.

2. Checking soil leaching.

3. Checking the effects of using chemicals to control weeds.

4. Proper control and monitor of animals grazing.

 

MAKING COLLECTION WEEDS ALBUM WITH NAMES

Teacher’s/Pupil’s Collection

 

Other Materials – Plants – Weeds (Unwanted Plants) | Identification and Meaning of Weeds | Importance of Weeds | Ways | of Protecting the Soil and Environment against Pollution Primary 4 (Basic 4) ASEI PDSI METHOD

 

PRESENTATION

To deliver the lesson, the teacher adopts the following steps:

1. To introduce the lesson, the teacher revises the previous lesson. Based on this, he/she asks the pupils some questions;

2. Guides and leads the pupils to collect samples of unwanted plants.

Pupil’s Activities – Collect samples of unwanted plants.

3. Tells the pupils that the unwanted plants are called weeds.

Pupil’s Activities – Listen to the teacher’s explanation.

4. Asks the pupils to explain what weeds are.

Pupil’s Activities – Explain the meaning of weeds.

5. Assists the pupils to make a weed album.

Pupil’s Activities – Prepare a weed album.

6. Discusses the importance and control of weeds.

Pupil’s Activities – Participate actively in the class discussion.

7. Leads the pupils to identify ways of protecting the soil and environment from erosion.

Pupil’s Activities – Identify ways of protecting the soil and environment from erosion.

 

CONCLUSION

  • To conclude the lesson for the week, the teacher revises the entire lesson and links it to the following week’s lesson.

 

LESSON EVALUATION 

Pupils to:

1. define and identify of weeds;

 

 

2. state 4 importance of weeds;

3. list 2 control measures for weeds.

 

 

WEEKLY ASSESSMENT 

ATTEMPTS ALL THE QUESTIONS 

 

1. _________________ are the unwanted plants.

A. Crops

B. Plants

C. Weeds

 

2. Weeds are the unwanted _________________.

A. Crops

B. Plants

C. Weeds

 

3. _________________ are plants that grow where they are not planted and wanted.

A. Crops

B. Plants

C. Weeds

 

4. _________________ can be grasses, trees, herbs or crops.

A. Crops

B. Plants

C. Weeds

 

5. _________________ is the used of insects and animals to feed on the weeds.

A. Chemical control

B. Biological control

C. Chemical control

 

6. _________________ involves picking or weeding.

A. Chemical control

B. Biological control

C. Chemical control

 

7. _________________ is the used of chemicals.

A. Chemical control

B. Biological control

C. Chemical control

 

8. Weeds can be defined as _________________.

 

 

A. unwanted grasses

B. unwanted crops

C. unwanted plants

 

9. State 2 importance of weeds

  • _________________
  • _________________

 

10. Allow animals to feed on the weeds is recommend without proper control.

A. True

B. False

C. No

 

 

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