Partition shapes and identify halves and quarters of circles and rectangles

EngageNY 60 min(s)Support for English Language Learners

This lesson introduces the terms half and quarter, or fourths, to name two equal parts of a whole and four equal parts of a whole, respectively. Students learn half-circle and quarter-circle as the names of shapes and recognize that they are named for their size and shape in relation to a whole circle. They also use models of rectangular and circular pizzas to discuss equal parts of the whole.

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Other lessons from Unit 5 in Grade 1 by EngageNY

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Unit 5, Lesson 7

Name and count shapes as parts of a whole, recognizing relative sizes of the parts.

60 min(s)

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Unit 5, Lesson 9

Partition shapes and identify halves and quarters of circles and rectangles.

60 min(s)

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Unit 5, Lesson 10

Construct a paper clock by partitioning a circle and tell time to the hour.

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Recognize halves within a circular clock face and tell time to the half hour.

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1 Content Standard is aligned with this lesson

1.G.A.3

Major StandardsSupporting StandardsAdditional Standards

Standard 1.G.A.3

Partition circles and rectangles into two and four equal shares, describe the shares using the words "halves", "fourths", and "quarters", and use the phrases "half of", "fourth of", and "quarter of". Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.

Part of Additional Cluster 1.G.A

1 Math Practice Standard is aligned with this lesson

Standard MP.7

Look for and make use of structure.

Prerequisites for 1.G.A.3

1st Grade

1.G.A.2

Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape.

Upcoming Standards for 1.G.A.3

2nd Grade

2.G.A.3

Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half of, a third of, etc., and describe the whole as two halves, three thirds, four fourths. Recognize that equal shares of identical wholes need not have the same shape.