Class: Primary 3
Term: 1st Term
Week: 2
Class: Primary 3
Age: 8 years
Duration: 45 minutes
Date:
Subject: Basic Science and Technology
Curriculum Theme: Basic Science
Topic: Measurement of Mass
SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to
- Explain the meaning of Mass & Weight
- Identify and mention various instruments for measuring mass & Weight
- Identify the metric units of measuring mass
- Use mass balance to estimate the masses of objects in the classroom such as pencils, notebooks, etc.
INSTRUCTIONAL MATERIALS: weighing scale, lever arm balance, rope, sticks, record book, charts on standard units of mass, playing ground, balls.
INSTRUCTIONAL PROCEDURES
CONTENT DEVELOPMENT – Measurement of Mass
| Time | Content | Teaching Method | Teacher’s Activities | Pupils Activities |
|---|---|---|---|---|
| 3 mins | Introduction | Question and Answer | Ask questions to assess prior knowledge on the meaning of mass and weight and relates it to the previous lesson on length | Pupils respond to questions about the meaning of mass and weight |
| 4 | Definition | Lecture, planned repetition and Explanation | Teachers defines weight & mass and explains | Pupils listen and participates in the planned repetition. |
| 8 mins | Explanation | Lecture and Discussion | Explain and discuss various instruments for measuring mass and weight | Pupils listen and participate in a discussion about various instruments for measuring mass and weight |
| 10 mins | Demonstration | Practical Activity | Demonstrate the use of a mass balance to estimate the masses of objects in the classroom | Pupils observe as the teacher demonstrates the use of a mass balance to estimate the masses of objects in the classroom |
| 10 mins | Group Work | Collaborative Learning | Guide and facilitate group work to identify the metric units of measuring mass and conversion | Pupils work in groups to identify the metric units of measuring mass |
| 10 mins | Conclusion | Recap and Summary | Summarize and recap the lesson by explaining the meaning of mass and weight | Pupils summarize the lesson by explaining the meaning of mass and weight |
NOTE
What is Mass?
Mass is the amount of stuff, or matter, an object is made of. It tells us how heavy or light an object is. For example, a big rock has more mass than a small pebble because it has more stuff inside it.
What is weight?
Weight is the force that pulls objects towards the Earth. It’s what makes objects feel heavy or light. When you step on a weighing scale, it measures your weight. Objects can weigh differently because of their mass.
Instruments for measuring mass and weight
The following instruments are used to measure mass & weight: Mass balance, beam balance, spring balance, physical balance, electronic weighing machines, etc
Metric unit of mass and weight
10 milligrammes = 1 decigramme
10 decigrammes = 1 centigramme
10 centigrammes = 1 gramme
1000 grammes = 1 kilogramme
1000 Kilogrammes= 1 tonne
EVALUATION:
1. Define Mass
- Define Mass
- What is weight?
- List 3 standard instrument for measuring mass and weight
- Recite the metric unit of mass and weight
CLASSWORK: As in evaluation
NOTE TO TEACHERS:
Please note that the actual content of the lesson, teaching methods, and pupil activities may vary based on your specific teaching style and curriculum or resources. Feel free to customize the lesson note to fit your needs.
Remember to use examples and comparisons that the child can relate to, such as comparing the mass of different objects they encounter in their daily life.
