Number: MA.2.GR.2
Title: Describe perimeter and find the perimeter of polygons.
Type:
Standard
Subject: Mathematics (B.E.S.T.)
Grade: 2
Strand: Geometric Reasoning
Related Benchmarks
This cluster includes the following benchmarks
| Code |
Description |
| MA.2.GR.2.1: | Explore perimeter as an attribute of a figure by placing unit segments along the boundary without gaps or overlaps. Find perimeters of rectangles by counting unit segments.Clarifications:
Clarification 1: Instruction emphasizes the conceptual understanding that perimeter is an attribute that can be measured for a two-dimensional figure.
Clarification 2: Instruction includes real-world objects, such as picture frames or desktops.
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| MA.2.GR.2.2: | Find the perimeter of a polygon with whole-number side lengths. Polygons are limited to triangles, rectangles, squares and pentagons.Clarifications:
Clarification 1: Instruction includes the connection to the associative and commutative properties of addition. Refer to Properties of Operations, Equality and Inequality (Appendix D).
Clarification 2: Within this benchmark, the expectation is not to use a formula to find perimeter. Clarification 3: Instruction includes cases where the side lengths are given or measured to the nearest unit.
Clarification 4: Perimeter cannot exceed 100 units and responses include the appropriate units. |
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Related Access Points
This cluster includes the following access points.
Access Points
| Access Point Number |
Access Point Title |
| MA.2.GR.2.AP.1: | Explore perimeter as an attribute of a figure that can be measured by placing unit segments along the boundary without gaps or overlaps. Find perimeters of rectangles by counting unit segments. |
| MA.2.GR.2.AP.2: | Find the perimeter of a polygon with whole-number side lengths given. Polygons are limited to triangles, rectangles and squares. |
Related Resources
Vetted resources educators can use to teach the concepts and skills in this topic.
Lesson Plans
| Name |
Description |
| A Table For 36 Please: | This lesson reinforces perimeter as students arrange tables to decorate.
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| Finding Perimeter by Counting Unit Segments: | In this lesson, students will explore a real world problem based on the Marilyn Burns book Spaghetti and Meatballs for All!. The problem and further practice finding the distance around rectangles will lead them to conceptually understand finding the perimeter of rectangles. |
Perspectives Video: Expert
| Name |
Description |
| B.E.S.T. Journey: | What roles do exploration, procedural reliability, automaticity, and procedural fluency play in a student's journey through the B.E.S.T. benchmarks? Dr. Lawrence Gray explains the path through the B.E.S.T. mathematics benchmarks in this Expert Perspectives video. |
