SALTA 1st grade

1.G.3

Strand: Geometry

Topic 15: Equal Shares of Circles and Rectangles Pick a Project • Four Square • Square Dancing • Spinning and Winning 15-1 Make Equal Shares 15-2 Make Halves and Fourths of Rectangles and Circles 15-3 Understand Halves and Fourths 3-ACT MATH: Pieced Out 15-4 Problem Solving: Model with Math

Topic 15:

First grade students will reason with shapes and their attributes.

• equal shares • halves • fourths • quarters

Standard 1.G.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 that, for these examples, decomposing into more equal shares creates smaller shares.

Topic 15 Manipulatives •

Paper rectangles and circles

Fractions of circles

• •

Fractions of rectangles

Assessment Options: Topic 15 Assessment – Equal Shares of Circles and Rectangles (print or online) Topic 15 Performance Assessment – Equal Shares of Circles and Rectangles Team Created Assessment

OPTIONAL District Wide Standards-Based Assessment #4 (Window: May 23 – May 26)

Assessment Tasks – Topics 15

Procedural Check

Application Task

1.G.3

Partition a rectangle into halves. (DOK 1)

Sam is having a pizza party. Show how Sam can share the pizza equally. (DOK 2)

Partition a circle into fourths. (DOK 1)

Mr. Williams made peanut butter sandwiches for his two children. He used the same bread for both sandwiches. He cut Jana’s sandwich into 2 pieces. He cut Brooklyn’s sandwi ch into 4 pieces. Who had bigger pieces? Draw a picture to justify your answer. (DOK 3)

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