B5 Mathematics · Term 3 Week 4: Measurement

Lesson notes

Learning Objectives

Indicator: B5.3.2.2.1 - Select and justify referents for cm³ or m³ units.

By the end of the lesson, learners can:

Describe a cubic centimetre (1 cm³) as the volume of a cube measuring 1 cm × 1 cm × 1 cm, and a cubic metre (1 m³) as the volume of a cube measuring 1 m × 1 m × 1 m.
Identify at least three everyday objects in their classroom or compound that serve as referents for 1 cm³ and at least three referents for 1 m³.
Select an appropriate unit (cm³ or m³) for measuring the volume of given containers and objects, and justify their choice with a clear reason.
State the relationship between 1 cm³ and 1 m³, including that 1 m³ = 1,000,000 cm³ and that 1 cm³ = 1/1,000,000 of 1 m³.
Work collaboratively in groups to sort objects and containers by the most suitable volume unit, explaining their reasoning to the class.

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Curriculum details

Strand: Geometry and Measurement (Strand 3)
Sub-strand: Measurement (3.2)
Content standard: B5.3.2.2 - Demonstrate an understanding of volume of common 3D shapes
Indicator: B5.3.2.2.1 - Select and justify referents for cm 3 or m 3 units.
Suggested placement: Term 3, Week 4 (Week 28 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Source document note: The official curriculum document has a fault in this entry, so the curriculum text above is transcribed exactly as printed:

exemplars - p.100
Curriculum reference: Mathematics Curriculum for Primary Schools (Basic 4-6), 2019, p. 100
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g. 1 Show learners an object which is a cubic centimetre (or 1 cm 3 ) and another object which is a cubic metre (or 1 m 3 )
E.g. 2 Let learners explore the classroom and compound to find that can be used as referents for the cubic centimetre (1cm 3 ) and cubic metre (1m 3 ). Example of 1m 3 is polytank; and 1cm 3 is cube sugar.
E.g. 3 Ask learners identify containers in the classroom and compound that can be measured using cubic centimetre (cm 3 ) and cubic metre (m 3 )
E.g. 4 Ask learners to explore and state the relationship between 1cm 3 and 1m 3 ; that is, a cubic is the volume of a cube with measurements 1cm x 1cm x 1cm, and is equal to 1/1,000,000 of a cubic meter, 1/1,000 of a litre (i.e. 1m 3 = 100cm x 100cm x 10cm = 1,000,000cm 3 ).

Figure from the b5 mathematics curriculum, printed page 100

 The cube diagrams and their labels ("10 x 10 x 10 of this cubes is 1m 3", "1 000 cm 3 = 1 L") are set beside E.g. 2 to E.g. 4 and interleave with them in the text layer; the figure shows them. Superscripts are printed as separate characters, so "cm 3" means cubic centimetre.