In Grade 1, instructional time should focus on four critical areas: (1) developing understanding of addition, subtraction, and strategies for addition and subtraction within 20; (2) developing understanding of whole number relationships and place value, including grouping in tens and ones; (3) developing understanding of linear measurement and measuring lengths as iterating length units; and (4) reasoning about attributes of, and composing and decomposing geometric shapes.
Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size) ; build and draw shapes to possess defining attributes.
| Content | Skills | Learning Targets | Big Ideas | Essential Questions |
|---|---|---|---|---|
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2 - Distinguish (between defining attributes and non-defining attributes of shapes)
6 - Build (shapes with defining attributes)
6 - Draw (shapes with defining attributes)
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1 - I can identify defining attributes of shapes (e.g., triangles are closed and three-sided).
1 - I can identify non-defining attributes of shapes (e.g., color, orientation, overall size).
2 - I can distinguish between defining attributes and non-defining attributes of shapes.
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A. Shapes have both defining and non-defining attributes.
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A.1 How can one distinguish between the defining and non-defining attributes of a particular shape?
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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.
| Content | Skills | Learning Targets | Big Ideas | Essential Questions |
|---|---|---|---|---|
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Two-Dimensional Shapes
Three-Dimensional Shapes
Shapes
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6 - Compose (two-dimensional shapes)
6 - Compose (three-dimensional shapes)
6 - Create (composite shapes from two-dimensional shapes)
6 - Create (composite shapes from three-dimensional shapes)
6 - Compose (new shapes from composite shapes)
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6 - I can compose two-dimensional shapes such as rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles.
6 - I can compose three-dimensional shapes such as cubes, right rectangular prisms, right circular cones, and right circular cylinders.
6 - I can create composite shapes from two-dimensional shapes.
6 - I can create composite shapes from three-dimensional shapes.
6 - I can compose new shapes from composite shapes.
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A. Shapes can be composed of other shapes.
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A.1 How can two-dimensional shapes of different kinds be combined into other shapes?
A.2 How can three-dimensional shapes of different kinds be combined into other shapes?
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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.
| Content | Skills | Learning Targets | Big Ideas | Essential Questions |
|---|---|---|---|---|
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Shapes
Partitions
Share Phrases
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3 - Partition (circles and rectangles into two and four equal shares)
2 - Describe (shares using the words "halves," "fourths," and "quarters")
2 - Describe (shares using the phrases "half of," "fourth of," and "quarter of")
2 - Describe (the whole as "two of," or "four of" the shares)
2 - Understand (decomposing into more equal shares creates smaller shares)
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3 - I can partition circles and rectangles into two and four equal shares.
2 - I can describe shares using the words "halves," "fourths," and "quarters."
2 - I can describe shares using the phrases "half of," "fourth of," and "quarter of."
2 - I can describe the whole as "two of," or "four of" the shares.
2 - I can understand how decomposing existing shares into more equal shares creates smaller shares.
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A. Circles and rectangles can be partitioned into equal shares.
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A.1 What are equal shares? How can circles and rectangles be partitioned?
A.2 How can the equal parts of partitioned circles and rectangles be described?
A.3 What results when equal shares of a shape are decomposed into more equal parts?
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