(Lesson seeds are ideas for the domain/cluster/standard that can be used to build a lesson. Lesson Lesson Seed: Equal Shares Seeds are not meant to be all-inclusive, nor are they substitutes for instruction.) Domain: 1.G. Geometry/Grade 1 Cluster: 1.G.A. Reason with shapes and their attributes Standard(s): 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. Purpose/Big Idea: Students partition circles and rectangles into two and four equal share to learn about halves, fourths, and quarters. Materials: Resource Sheet 1: Circles (circles should be cut out prior to lesson and bagged two sets for each student) – Resource Sheet 2: Rectangles (rectangles should be cut out prior to lesson and bagged two sets – for each student) Crayons or pencils, if desired Activity: Distribute a bag of circles to each student. Ask the students to take out one circle and fold it in half. Ask students to take out the same size circle from their bag and fold it in fold it in half again. half…then Have students talk to each other about what they notice about the parts of their circles. Allow time for students to share with the class. Repeat with the sets of rectangles. If desired have student use a crayon or pencil to mark the folds and highlight the parts. Guiding Questions: What do you notice about the parts of your cirlce? (equal pieces) How many equal pieces is your circle divided into? When you folded a second time, what happen to the size of your pieces? Does anyone know what these pieces are called?
Lesson Seed: Equal Shares (Lesson seeds are ideas for the domain/cluster/standard that can be used to build a lesson. Lesson Seeds are not meant to be all-inclusive, nor are they substitutes for instruction.) Domain: 1.G. Geometry/Grade 1 Cluster: 1.G.A. Reason with shapes and their attributes Standard(s): 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. Purpose/Big Idea: Students partition circles and rectangles into two and four equal share to learn about halves, fourths, and quarters. Materials: Resource Sheet 1: Circles (circles should be cut out prior to lesson and bagged – two sets for each student) Resource Sheet 2: Rectangles (rectangles should be cut out prior to lesson and bagged – two sets for each student) Crayons or pencils, if desired Activity: Distribute a bag of circles to each student. Ask the students to take out one circle and fold it in half. Ask students to take out the same size circle from their bag and fold it in half…then fold it in half again. Have students talk to each other about what they notice about the parts of their circles. Allow time for students to share with the class. Repeat with the sets of rectangles. If desired have student use a crayon or pencil to mark the folds and highlight the parts. Guiding Questions: What do you notice about the parts of your cirlce? (equal pieces) How many equal pieces is your circle divided into? When you folded a second time, what happen to the size of your pieces? Does anyone know what these pieces are called?