Lesson Note: Introduction to Weight & Units of measuring weight

WEEK 1

Subject: Mathematics

Class: Basic 3

Term: 3^rd Term

Topic: Weight

Behavioural Objectives: At the end of the lesson, pupils should be able to:

• Mention weight of objects in grams and kilograms
• Make meaningful comparison of weight of objects like rocks,minerals.

CONTENT

CONCEPT OF WEIGHT

Weight is the measure of how heavy or light an object is. Objects of bigger size and density often seem heavy to lift up, consider the following b;

COMPARING WEIGHT

A bottle of water weigh more than an empty bottle

A sister weighs less than a mug

A mathematics textbook weighs more than an exercise book.

Activity

1. Weigh the objects and record their weights in kilograms or grams.
2. 6 packets of whiteboard markers 2. 3 tins of Milo
3. 1 mathematics textbook 4. 1 bottle of water
4. 10 packets of pencils 6. 1 tin of milk
5. 1 bag of Semolina 8. 1 packet of biscuits
6. 2 big tins of Peak Milk

Standard units of weight

We need to use standard units to measure weight.

The kilogram (kg) is used as a unit when weighing heavy objects like

bags of rice, bags of cement, etc.

The gram (g) is used when weighing lighter objects like pencils, rulers, etc.

Measuring and estimating weight

These are different types of weighing scales

Exercise 1

Classify these objects according to their weight in grams and kilograms.

Name of objects            Weight in grams (g)     Weight in kilogram (kg)

1. Bottle of water
2. Pencil
3. Eraser
4. Bag of sugar
5. Jug
6. Ruler
7. Stone
8. Bottle of Fanta

Name of objects       Weight in grams (g)      Weight in kilogram (kg)

1. Toothbrush
2. Orange
3. Rock
4. Scissors
5. 5 tins of Milo
6. A bundle of nails
7. 2 notebooks
8. A baby doll

Exercise 2

CONCLUSION: To conclude the lesson, the teacher commends the pupils and grades their exercises.