T4T Comparing 2D & 3D Shapes
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Task Excerpt:
Domain 
Geometry 
Cluster 
Identify and describe shapes Analyze, compare, create, and compose shapes. 
Standard(s) 
NC.K.G.2 Correctly name squares, circles, triangles, rectangles, hexagons, cubes, cones, cylinders, and spheres regardless of their orientations or overall size.
NC.K.G.3 Identify squares, circles, triangles, rectangles, hexagons, cubes, cones, cylinders, and spheres as twodimensional or three dimensional
NC.K.G.4 Analyze and compare two and threedimensional shapes, in different sizes and orientations, using informal language to describe their similarities, differences, attributes and other properties. 
Materials 
BLM of circle and square, sphere and cube 
Task 
Part A: 1. Hand the student a square. Say: · What is this shape? How do you know it is a ______ (insert student’s shape)? · After rationale is provided, provide correct shape name if needed. · Is this a 2 dimensional or 3 dimensional shape? How do you know? 2. Hand the student a cube. Say: · What is this shape? How do you know it is a ______ (insert student’s shape)? · After rationale is provided, provide correct shape name if needed. · Is this a 2 dimensional or 3 dimensional shape? How do you know? 3. Hand the student both the square and cube. Say: · How are the square and cube similar? · How are the shapes different?
Part B: 1. Hand the student a circle. Say: · What is this shape? How do you know it is a ______ (insert student’s shape)? · After rationale is provided, provide correct shape name if needed. · Is this a 2 dimensional or 3 dimensional shape? How do you know? 2. Hand the student a sphere. · What is this shape? How do you know it is a ______ (insert student’s shape)? · After rationale is provided, provide correct shape name if needed. · Is this a 2 dimensional or 3 dimensional shape? How do you know? 3. Hand the student both shapes. Say: · How are the circle and sphere similar? · How are the shapes different? 
Continuum of Understanding 

Not Yet Proficient 
● Cannot name shapes ● Is not able to compare the shapes ● Does not use geometric attributes to describe/justify shape names 
Progressing 
● Correctly names some the shapes ● Uses some geometric attributes to describe/justify shape names (e.g., number of sides, number of edges, number of corners, etc.) ● Can determines if shapes are 2D or 3D but cannot explain their rationale 
Met Expectation 
● Correctly names the shapes ● Uses geometric attributes to describe/justify shape names (e.g., number of sides, number of edges, number of corners, etc.) ● Correctly determines if shapes are 2D or 3D and can explain their rationale 