Class: Primary 3
Term: First Term
Subject: Mathematics
Topic: weight
Previous Lesson:
Content/Learning Area: What is Weight?, Standard Units of Measurement: Grams and Kilograms, Other units of Measurement, Instruments for Measuring Weight, Using a Scale, Finding and Recording Weights, Comparing Weights: Light and Heavy Objects, Fun Activity: Weight Hunt
Time Allocation: 40 minutes

Performance Objectives

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

• Cognitive Domain: Define weight and identify standard units of measurement.
• Affective Domain: Show interest in measuring and comparing weights of different objects.
• Psychomotor Domain: Use a scale to measure and record the weights of various items.
• Social Domain: Cooperate with peers during the weight hunt activity.

reference Materials

1. Textbooks
2. Charts showing units of weight
3. Real-life objects for measuring weight

Instructional Materials

To deliver this lesson, the teacher will employ the help of the following materials: a weighing scale, various objects (e.g., books, pencils, fruits), charts showing units of weight, and activity worksheets.

rationale for the Lesson

Understanding weight is crucial for daily activities like shopping and cooking.This lesson introduces pupils to weight measurement,making them aware of units and tools used.

Prerequisite/Previous Knowledge

Pupils have basic knowledge of numbers and comparison of objects.

Lesson Content

What is Weight?

Weight is a measure of how heavy an object is. It tells us how much matter is in something and how strongly gravity pulls on it.

Standard Units of Measurement: Grams and Kilograms

Grams (g) and kilograms (kg) are standard units for measuring weight. Kilograms are used for heavier objects, while grams are used for lighter ones.

Other Units of Measurement

Besides grams and kilograms, there are other units used to measure weight.

These include:

1. Pounds (lbs): Commonly used in some countries for measuring weight.
2. Ounces (oz): Smaller units frequently enough used for measuring very light items.
3. Tonne (t): Used for measuring very heavy objects like vehicles or large quantities of goods.
4. Milligrams (mg): Used for measuring extremely light items, often in scientific contexts.

Instruments for Measuring Weight

Instruments for measuring weight are tools that help us determine how heavy an object is.

Examples are:

1. Weighing Scale: Used to measure the weight of objects in grams or kilograms.
2. Kitchen Scale: Used for measuring ingredients in cooking.
3. Bathroom Scale: Used to measure a person’s weight.
4. Spring Scale: Uses a spring to measure weight, frequently enough used for luggage.

Using a Scale

Using a scale involves placing an object on the scale and reading the measurement shown. Ensure the scale is on a flat surface and calibrated to zero before use.

Finding and Recording Weights

Finding and recording weights involves using a scale to measure the weight of different objects and writing down the measurements. This helps in comparing and tracking weights.

Comparing Weights: Light and Heavy Objects

Comparing weights involves determining which objects are lighter or heavier than others. This helps in understanding the concept of weight and measurement.Fun Activity: Weight Hunt

A weight hunt is an activity where pupils find different objects and measure their weights using a scale. This makes learning about weight fun and interactive.

Teaching Methods

To deliver this lesson,‌ ⁤the teacher will⁤ adopt⁤ the following methods: Discussion, demonstration, practical activities, and questioning.

Instructional Procedures

To deliver this lesson, the teacher will adopt the following steps:

Step 1: Introduction (Set Induction)

Time: 5 minutes
Teaching Skill: set Induction
Teacher’s Activity: The teacher asks pupils what they know about weight and shows them a weighing scale.
Pupils’ Activity: Pupils share their ideas about weight and observe the weighing scale.

Step 2: Explaining Weight and Units

Time: 10 minutes
Teaching Skill: Clarification
Teacher’s Activity: The teacher explains what weight is and introduces grams and kilograms as standard units.
Pupils’ Activity: pupils listen attentively and ask questions to clarify their understanding.

Step 3: Demonstrating How to Use a Scale

Time: 10 minutes
Teaching Skill: Demonstration
Teacher’s Activity: The teacher demonstrates how to use a weighing scale to measure the weight of different objects.
Pupils’ activity: Pupils observe the demonstration and ask questions about the process.

Step 4: Practical activity: Measuring Weights

Time: 10 minutes
Teaching Skill: Practical Request
Teacher’s Activity: The teacher guides pupils to measure and record the weights of various items using the scale.
Pupils’ Activity: Pupils measure the weights of objects and record their findings on a worksheet.

step 5: Note-Taking

Time: 3 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher writes a summary of the lesson on the board.
Pupils’ Activity: Pupils copy the notes into their notebooks.

Step 6: Evaluation/Review

Time: 2 minutes
Teaching skill: Assessment
Teacher’s Activity: The teacher asks questions to assess pupils’ understanding of the lesson.
Pupils’ Activity: Pupils answer the questions to demonstrate their understanding.

Step 7: Conclusion

Time: 2 minutes
Teaching Skill: Closure
Teacher’s Activity: The teacher summarizes the main points of the lesson and assigns homework.
Pupils’ Activity: Pupils listen to the summary and note down the homework assignment.

lesson Keywords

• Weight – A measure of how heavy an object is.
• Gram (g) – A standard unit for measuring light objects.
• Kilogram (kg) – A standard unit for measuring heavier objects.
• Scale – An instrument used to measure weight.

Lesson Evaluation

To evaluate the learning, the teacher asks pupils to:

1. Define weight in their own words.
2. Name two standard units of measurement for weight.
3. Demonstrate how to use a scale to measure the weight of an object.
4. Compare the weights of two different objects and identify which is heavier.

Assignment/Homework

1. Find five different objects at home and measure their weights using a kitchen scale or any available scale.
2. Record the weights of the objects in grams or kilograms.
3. Compare the weights and list the objects from lightest to heaviest.

Differentiation

• For slower learners: Provide one-on-one assistance and use simpler objects for measurement.
• For advanced learners: Challenge them to estimate weights before measuring and convert between grams and kilograms.
• for visual/auditory/kinesthetic learners: Use visual aids, verbal explanations, and hands-on activities to cater to different learning styles.

Note for Teachers

Ensure the weighing scale is properly calibrated before the lesson. provide clear instructions and guidance during the practical activity to help pupils accurately measure and record weights.