Click to see introduction to Grades 1&2 Guide

CCSS Geometry: Reasoning with shapes and their attributes

 

1.G.A.3 Partition circles and rectangles into two and four equal shares.

• Lesson 1: Parts (equal shares) of Rectangles (Online Sample)
• Worksheet #1A (Online Sample)
• Worksheet #1B

• Lesson 2: Describing Parts (equal shares) of Rectangles
• Worksheet #2A
• Worksheet #2B

• Lesson 3: Parts (equal shares) of Circles
• Worksheet #3A
• Worksheet #3B

 

1.G.A.3 Describe the shares using the words halves, and fourths, and quarters, and use the phrase half of, fourth of, and quarter of. Describe the whole as two of or four of the shares.

• Lesson 4: Descriptions for Parts (equal shares) of a Whole
• Worksheet #4A
• Worksheet #4B

 

1.G.A.3 Understand for these examples that decomposing into more equal shares creates smaller shares.

• Lesson 5: Decomposing into Smaller Equal Shares
• Worksheet #5A
• Worksheet #5B

 

Ordering Information

Click to see introduction to Grades 1&2 Guide

CCSS Geometry: Reason with shapes and their attributes

 

2.G.A.3 Partition circles and rectangles into two, three, or four equal shares.

• Lesson 1: Parts (equal shares) of Rectangles
• Worksheet #1A
• Worksheet #1B

• Lesson 2: Describing Parts (equal shares) of Rectangles
• Worksheet #2A
• Worksheet #2B

• Lesson 3: Parts (equal shares) of Circles
• Worksheet #3A
• Worksheet #3B

 

2.G.A.3 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.

• Lesson 4: Descriptions for Parts (equal shares) of a Whole (Online Sample)
• Worksheet #4A (Online Sample)
• Worksheet #4B

• Lesson 5: (Optional) Different Sizes of Equal Shares
• Worksheet #5A
• Worksheet #5B

 

2.G.A.3 Recognize that equal shares of identical wholes need not have the same shape.

• Lesson 6: Different Shapes of Equal Shares
• Worksheet #6A
• Worksheet #6B

 

 

Ordering Information