Fractions · B2 Mathematics

Lesson notes

Learning Objectives

Indicator: B2.1.3.1.1

By the end of the lesson, learners can:

Partition a concrete object (such as paper, cloth, or fruit) into two and four equal parts and identify one-half and one-quarter.
Identify and name the shaded part of a pictorial representation as one-half or one-quarter.
Sort pictorial representations into groups of halves and one-quarters.
Explain in their own words that one-half means 1 part out of 2 equal parts, and one-quarter means 1 part out of 4 equal parts.
Justify their sorting decisions by explaining why a given picture shows one-half or one-quarter.

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Curriculum details

Strand: Number (Strand 1)
Sub-strand: Fractions (1.3)
Content standard: B2.1.3.1 - Develop an understanding of halves and fourths using concrete and pictorial representations [Exclude notation here]
Indicator: B2.1.3.1.1 - Understand the fraction one-half and one-quarter as the quantity obtained by taking 1 part when a whole is partitioned into two or four equal parts
Suggested placement: Term 2, Week 3 (Week 15 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. 29
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

E.g. 1. Use concrete objects to explain the fraction one-fourth as the quantity obtained by taking 1 part when a whole object is partitioned into four equal parts.
E.g. 2. Use pictorial representations to explain the fraction one-fourth as the quantity obtained by taking 1 part when a whole object is partitioned into four equal parts.
E.g. 3. Use pictorial representations to help learners sort fractions into those that are halves and those that are one-fourths.

Twelve shapes to sort into halves and fourths. The nearly square black-and-white table is arranged with horizontal... — Twelve shapes to sort into halves and fourths. The nearly square black-and-white table is arranged with horizontal divisions, vertical divisions.