In this lesson students explore how new shapes can be formed by composing other shapes. This is remixable , especially to add various supports to meet the needs of all learners.

In this lesson, students learn the attributes of triangles by constructing them from various side lengths.

In this lesson, students explore various triangles by sorting them based on attributes such as having equal lengths and square corners (right angles).

In this lesson, students explore various quadrilaterals by sorting them based on attributes such as opposite sides having equal lengths and square corners (right angles).

In this lesson, students identify and explain the attributes of a quadrilateral and use defining attributes (number of sides, angles) to name quadrilaterals.

This file provides examples of math routines that align to Grade 3 Cluster 5. They can also be used after Cluster 5 to support students' maintenance and understanding of the content. This is remixable.

This document provides ideas for next steps and instructional moves to support the range of learners in Grade 3 Cluster 5. This is not remixable since it is from state leaders.

This resource is from NC Tools 4 Teachers. Here are parent letters to send home before teaching Grade 3 Cluster 5.

In this task students look at a page of quadrilaterals and decompose them into smaller triangles. They then complete a table and reason about the quadrilaterals and the triangles that were formed.

This task provides learners with the opportunity to analyze how shapes were sorted, and make generalizations about similar characteristics within a sorted group.

This short video and interactive assessment activity is designed to teach third graders an overview of rectangles, squares, circles and triangles.

This short video and interactive assessment activity is designed to teach third graders about identifying the properties of squares.

This interactive has a link to read about Quadrilaterals, as well as a place to manipulate and play with quadrilaterals' angles, sides, and diagonals.

In this lesson, students are introduced to different quadrilaterals. Students will discuss and compare rectangles, parallelograms and trapezoids.

Students will be able to identify polygons or shapes in the world around them and use those polygons to build origamis. Students will reinforce their understanding and play a geometric computer game when they have finished.

The students will develop an understanding of how quadrilaterals include all types of parallelograms, trapezoids, and other four-sided figures by exploring quadrilateral characteristics.  The students will understand that many types of quadrilaterals exist and that these shapes have some attributes in common.  The students will begin by comparing and contrasting various quadrilaterals with the use of Venn diagrams.  They will then move on to demonstrating their knowledge and understanding of quadrilaterals by creating a story about a quadrilateral that changes its shape (into various quadrilaterals- specific quadrilaterals such as a square, rectangle, rhombus…etc.) without losing/gaining sides.  This lesson was developed by NCDPI as part of the Academically and/or Intellectually Gifted Instructional Resources Project. This lesson plan has been vetted at the state level for standards alignment, AIG focus, and content accuracy.

In this lesson, students will describe a polygon in a riddle to share with a partner.

This resource is from Tools 4 NC Teachers. This document is the About the Cluster document for Cluster 5 created by the authors of the NC2ML Instructional Frameworks. This document should be read prior to teaching Cluster 5.

This challenging problem and brainteaser gives students an opportunity to compose and decompose polygons to make rectangles.