# Measurement of Length and Mass – Mass (Primary 3)

Last Updated on September 5, 2020 by Alabi M. S.

BASIC SCIENCE

BASIC SCIENCE AND TECHNOLOGY

FIRST TERM

WEEK 3

PRIMARY 3

THEME – LEARNING ABOUT OUR ENVIRONMENT

PREVIOUS LESSON – Measurement of Length and Mass – Length (Primary 3)

TOPIC – MEASUREMENT OF LENGTH AND MASS – LENGTH

LEARNING AREA

1. Instruments for Measuring Mass

2. Unit of Measuring Mass

3. Measuring Mass

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. name the instrument for measuring mass.

2. compare masses of objects using the balance provided.

3. state the metric units of mass.

ENTRY BEHAVIOUR

Tape rule, ruler, etc.

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of:

1. A chart on standard unit of mass

2. Lever arm balance

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

1. Scheme of Work

2. 9 – Years Basic Education Curriculum

3. Course Book

4. All Relevant Material

5. Online Information

CONTENT OF THE LESSON

LESSON ONE – INTRODUCTORY ACTIVITIES

Teacher’s/Pupil’s Activities – Displays different instruments for measuring mass for pupils to identify and ask them to state their uses.

Teacher’s Activities – Note the pupils points on the board or cardboard.

INSTRUMENTS FOR MEASURING MASS

1. Body weight or bathroom scale

2. Kitchen scale

3. Spring scale

TRADITIONAL MEASURING INSTRUMENTS

Teacher’s Pupil’s Activities – Asks pupils to mention other things we can use for measuring mass of the above mentioned are not available.

1. Hands

2. Plastic cup

3. Container, etc.

USES OF INSTRUMENTS FOR MEASURING LENGTHS

Pupil’s Activities – They are all used for measuring mass of an object, for example – body, food items, iron, aluminum, plastic, etc.

LESSON EVALUATION/HOME WORK

1. Find out 5 things we measured with weight scale, kitchen scale or spring scale.

2. Find out 5 people that used body weight scale, kitchen scale or spring scale.

LESSON TWO – UNITS OF MEASURING MASS AND MEASURING OF MASS OF OBJECTS OR BODY

Teacher’s/Pupil’s – Asks pupils to examine measuring instruments – body weight scale, kitchen scale or spring scale and tell you the alphabetical letter on the scale.

Records their observations.

UNITS OF MEASURING LENGTH

1. Gram – g

2. Kilogram – kg

MEASURING OF LENGTH

Teacher’s/Pupil’s Activities – Measuring the length of

1. Body of their body –

2. Oranges

3. 4 satchels of pure water, etc.

MEANING OF MASS

Teacher’s/Pupil’s Activities – Guides the pupils to explain what mass means.

Mass is the amount of matter in the body or objects. It is also known as weight.

LESSON EVALUATION/ASSIGNMENT

Use your hands to determine the objects that has more weight or mass than the other.

Notes, the objects provided must has a close mass.

PRESENTATION

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

1. Guides pupils to record their weights.

Pupil’s Activities – Working in pairs, pupils record their weights.

2. Uses the chart to teach pupils the metric units of mass.

3. Initiates class discussion on standard instruments for measuring mass.

Pupils Activities – Identify and apply the units of measurement.

4. Guides pupils to estimate masses of objects in the classroom.

5. Guides the pupils to use of lever arm balance and bathroom scale.

Pupil’s Activities – Use balance to estimate the masses of objects in the  classroom.

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. name two instruments for measuring mass.

2. state the metric units of mass.

3. use different mass instruments to estimate the masses of objects in the classroom and record their findings.

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