Before You Begin this Unit… 

Unit at a Glance 
Consider that this is not the first time that students have come in contact with geometry and determining the attributes of shape. In grade 2 students classified shapes using the lengths of the sides, angles, and vertices. The teachers notes within each lesson offer connections between work from the grade 2 geometry unit and grade 3 work.
You may want to complete each of the tasks that are outlined in each lesson and consider how each develops understanding within a specific standard. 
Unit at a Glance Suggested Dates: September 18 October 1 Estimated Duration: 10 days Click here to access the Geometry and Perimeter Unit. 

Standards Addressed in the Unit  
3.G.1 Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories. 3.MD.8 Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters. Link to CCSS Unpacking DocumentUpdated Sept. '15 