Measurement - Length, Mass, Time · B3 Mathematics

Lesson notes

Learning Objectives

Indicator: B3.3.3.2.1 - Model and describe the relationship between the units Kilogram and gram as well as litres and millilitres

By the end of the lesson, learners can:

Identify objects that weigh approximately 1 gram and approximately 1 kilogram, and objects that hold approximately 1 millilitre and approximately 1 litre.
State and explain that 1000 grams make 1 kilogram, and 1000 millilitres make 1 litre, using models and concrete materials.
Choose the appropriate standard unit (g or kg; ml or l) for measuring the mass or capacity of a given object and justify the choice.
Model the relationship between grams and kilograms, and millilitres and litres, using a balance scale, graduated cylinder, or drawing.
Describe the relationship between 1000 g and 1 kg, and 1000 ml and 1 l, in their own words, using examples from everyday life.

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Curriculum details

Strand: Geometry and Measurement (Strand 3)
Sub-strand: Measurement - Length, Mass, Time (3.3)
Content standard: B3.3.3.2 - Demonstrate an understanding of kilogram and gram (Kg, g) unit for measuring mass and millitre and litre (ml, l) for measuring capacity
Indicator: B3.3.3.2.1 - Model and describe the relationship between the units Kilogram and gram as well as litres and millilitres
Suggested placement: Term 3, Week 6 (Week 30 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.
Curriculum reference: Mathematics Curriculum for Primary Schools (Basic 1-3), 2019, p. 68
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g. 1. Identify objects that weigh approximately 1 g or 1 kilogram (or that hold 1 ml or 1 l). Estimating the mass, or capacity of given objects using these objects as a reference point or point of comparison
E.g. 2. Identify the appropriate standard unit (g or Kg; ml or l;) for measuring the mass or capacity of a given object
E.g. 3. Estimate, then measure, using a scale (or graduated cylinder) and recording the mass (capacity) of common, everyday objects to the nearest g or kg (or ml or l).
E.g. 4. Explain the relationship between 1000 g and 1 kg using a model or balance or between 1000 ml and 1 l using a graduated cylinder