Common Core 3-D Shapes Question and Answer:
In the common core we do not teach 3-D shapes. However, the pacing guide tells us to teach 3-D shapes in unit two. Should we stick to the common core or to the pacing guide?


Answer: Students in grade 2 should be working with 3-dimensional shapes. The 2nd grade Introduction specifies 3D shapes. Standard 2.G.1 also mentions "faces".


Mathematics | Grade 2 (Introduction)
In Grade 2, instructional time should focus on four critical areas: (1)
extending understanding of base-ten notation; (2) building fluency with
addition and subtraction; (3) using standard units of measure; and (4)
describing and analyzing shapes.

(4) Students describe and analyze shapes by examining their sides and
angles. Students investigate, describe, and reason about decomposing
and combining shapes to make other shapes. Through building, drawing,
and analyzing two- and three-dimensional shapes, students develop a
foundation for understanding area, volume, congruence, similarity, and
symmetry in later grades.

Geometry 2.G (Content Standards)
Reason with shapes and their attributes.
1. Recognize and draw shapes having specified attributes, such as a given
number of angles or a given number of equal faces.5 Identify triangles,
quadrilaterals, pentagons, hexagons, and cubes.

Differentiation:


SMART Board resources for this unit:

gr 2_unit 2_copy tiles.notebook

gr 2_unit 2_double arrays.notebook
gr 2_unit 2_shape cards.notebook
gr 2_unit 2_sorting quadrilaterals.notebook
gr 2_collect 25 cents.notebook

Professional Reading- van Hiele levels of Geometric Development


Investigation 1 Features of 2-Dimensional and 3-Dimensional Shapes

Investigation 2 What is a Rectangle?

Investigation 3 Symmetry