Grade 1 Unit of Study 8: Three-Dimensional Figures

In This Unit of Study…

Students identify, compare, and sort three-dimensional figures (spheres, cubes, rectangular prisms, cones, and cylinders) based on their defining attributes. Students compose and decompose three-dimensional figures (cubes, rectangular prisms, cones, and cylinders). They also identify parts of real-world objects that are modeled by three-dimensional figures.

B.E.S.T. Benchmarks:

• MA.1.GR.1.1 Identify, compare and sort two- and three-dimensional figures based on their defining attributes. Figures are limited to circles, semi-circles, triangles, rectangles, squares, trapezoids, hexagons, spheres, cubes, rectangular prisms, cones, and cylinders.
• MA.1.GR.1.3 Compose and decompose two- and three-dimensional figures. Figures are limited to semi-circles, triangles, rectangles, squares, trapezoids, hexagons, cubes, rectangular prisms, cones, and cylinders.
• MA.1.GR.1.4 Given a real-world object, identify parts that are modeled by two- and three- dimensional figures. Figures are limited to semi-circles, triangles, rectangles, squares and hexagons, spheres, cubes, rectangular prisms, cones, and cylinders.

Key Concepts:

• I can identify, compare, and sort three-dimensional figures, including spheres, cones, cylinders, and rectangular prisms (including cubes).
• I can compose and decompose rectangular prisms (including cubes), cones, and cylinders.
• I can describe the attributes of a three-dimensional solid, such as edges, vertices, and faces.
• I can distinguish between a three-dimensional figure’s defining attributes and its nondefining attributes, such as orientation and size.
• I can identify nonexamples that lack one or more defining attributes.
• I can identify three-dimensional shapes in real-world objects.

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