Third Term Lesson Note for Week Nine.
Class : Primary 3
Subject : Mathematics
Topic : Capacity (Meaning and unit of measure)
Duration : 80 minutes
Period : Double Periods
Reference Book :
- New Method Mathematics for Primary Schools, Book 3, by Learn Africa.
- Lagos State Unified Schemes of Work for Primary Schools (Primary 1 – 3).
- Online Resources
Instructional Material : Chart showing metric unit of capacity and instruments used to measure capacity.
Learning Objectives : By the end of the lesson learners will be able to
i. Explain the meaning of capacity
ii. Identify the unit of measure of capacity
iii. Compare the different unit of measure of capacity
Content :
Capacity is the measure of liquid a container can hold.
Liquid substances are water, kerosene, juice, oil, petrol, milk, etc.
Measuring of Capacity
To measure capacity, we use a calibrated or graduated container such as measuring cylinder.
Containers such as spoon, cups, jug, bottle, kegs, drums, and tanks can be used to hold or measure liquid.
Metric unit of capacity.
10 millilitres (ml) = 1 centilitre (cl)
10 centilitres (cl) = 1 deciliter (dl)
10 decilitres (dl) = 1 litre (l)
1000 litres = 1 kilolitre (kl)
The standard unit of measure of capacity is litre (l), while other units are millilitre (ml), centilitre (cl).
We use litres for liquids in large container. For examples petrol diesel, and oil.
Liquids in small containers are measures in millilitres. For examples : lotions, perfumes, syrups.
Comparison of capacity.
1. 10ml = 1cl
2. 100cl = 1L
3. 1000 ml = 1L
Presentation Steps :
Step 1 : Revision of the previous lesson note with the learners by asking questions orally.
Step 2 : The teacher introduces the new topic by defining capacity and state the standard unit of measure of capacity.
Step 3 : Identify instrument for measuring capacity and state the relationship between the different units measuring capacity.
Step 4 : Explains the use of number lines to estimate capacity with different units such as ml to cl, cl to L and ml to L.
Evaluation :
1. How many 1/2 l are there in 3L?
2. How many ml are there in a Litre ?
3. ________ is the measure of the amount of liquid that a container can hold. (a) Length (b) Capacity (c) Weight
4. The standard unit of measure of capacity is __________. (a) Litre (b) Grams (c) metres
5. To measure capacity, a graduated container is used. (a) True (b) False (c) Not sure.
6. All of the following containers can be measured in milliliters except _____________. (a) syrup (b) perfume (c) petrol
Conclusion : At the end of the lesson, learners were able to answer the questions correctly.
Assignment :