B2 Mathematics · Term 1 Week 1: Counting, Representation, Cardinality & Ordinality

Lesson notes

Learning Objectives

Indicator: B2.1.1.1.1 - Use number names, counting sequences and how to count to find out “how many?”

By the end of the lesson, learners can:

Skip count forwards and backwards by 2s, 5s and 10s from 0 up to 1000 and back down to 0, starting at 0 or at any multiple of 2, 5, 10, 50 or 100.
Identify and correct errors or omissions in given counting and skip counting sequences.
Use skip counting by 2s, 5s or 10s to answer “how many?” questions about groups of objects up to 1000.
Represent the number of objects in a group with a written numeral up to 1000.
Estimate the number of objects in a group of up to 1000, describe the estimation strategy used, and justify the choice of an appropriate estimate.

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Curriculum details

Strand: Number (Strand 1)
Sub-strand: Counting, Representation, Cardinality & Ordinality (1.1)
Content standard: B2.1.1.1 - Count and estimate quantities from 0 to 1000
Indicator: B2.1.1.1.1 - Use number names, counting sequences and how to count to find out "how many?"
Suggested placement: Term 1, Week 1 (Week 1 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. 20
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g. 1. Skip count forwards and backwards to and from 1000 respectively by 2s, 5s and 10s, starting at 0 or at multiples of 2, 5, 10, 50 and 100; Identify and correct errors or omissions in counting or skip counting sequences
E.g. 2. Count by 2s, 5s or 10s, to answer "how many?" questions about as many as 100 or 1000 objects
E.g.3. Represent the number of objects in a group with a written numeral to 1000
E.g. 4. Estimate the number of objects in a group of up to 1000 describe the estimation strategy used; Select an appropriate estimate among all those given and justify the choice