2022 1-GM-1-4

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1.GM.1.4

1.GM.1.4 Recognize three-dimensional shapes such as cubes, cones, cylinders, pyramids, and spheres.

In a Nutshell

In this objective, students build on their previous work with three-dimensional shapes by actively engaging in activities that help them learn the names and attributes of cubes, cones, cylinders, pyramids, and spheres. This skill lays the foundation that will enable students to sort and categorize three-dimensional shapes in second grade.

Student Actions	Teacher Actions
Develop the ability to communicate mathematically by using appropriate vocabulary (eg. vertices, faces, edges) to describe the attributes of three-dimensional shapes that help students identify cubes, cones, cylinders, pyramids, and spheres. Develop a deep and flexible conceptual understanding when recognizing three-dimensional shapes based on the observable attributes and the student’s understanding of how a specific collection of those attributes can be used to identify specific three-dimensional shapes. Develop the ability to make conjectures, model, and generalize by creating mental images of geometric shapes using spatial memory and spatial visualization. During discussions, students will define properties, such as, how many faces (sides) and vertices (corners) classify a three-dimensional figure as either a cube, cone, cylinder, pyramid, or sphere to internalize the spatial memory of these solids.	Implement tasks that promote reasoning and problem-solving by emphasizing properties of shapes rather than simple identification while modeling using solids. Use and connect mathematical representations when challenging students with a variety of geometric tasks that ask students to compare and contrast two different solid shapes. Facilitate meaningful math discourse to engage students in the learning process and model the appropriate use of new vocabulary.
Key Understandings	Misconceptions
Cubes, cones, cylinders, pyramids, and spheres can be identified based on their attributes. Some three-dimensional shapes have common attributes with others but have their own unique combination of attributes (eg. can roll, can stack, and have curved sides).	Cones and pyramids have all the same attributes. Pyramids can only have one type of base. All rectangular prisms are cubes.
Knowledge Connections
Prior Knowledge	Leads to
Recognize squares, circles, triangles, and rectangles. (K.GM.1.1) Use shapes and spatial reasoning to represent real-world objects. (K.GM.1.6)	Sort three-dimensional shapes based on their attributes. (2.GM.1.4)