Before You Begin this Unit…  
Unit at a Glance 
In first grade, students distinguished between defining attributes (triangles are closed and 3sided) versus nondefining attributes (color, orientation, overall size). They also built and drew shapes to possess defining attributes. In first grade, students also composed 2D shapes (rectangles, triangles, squares, trapezoids, halfcircles and quartercircles) or 3D shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and composed new shapes from the composite shape. In this unit, students will identify and sort 2D shapes (triangles, quadrilaterals, pentagons, hexagons and cubes) by their number of sides and angles. Later in the unit, they will partition (separate) rectangles into rows and columns of samesize squares and count to find the total number of them. 
Suggested Dates: October 3 October 14 Estimated Duration: 8 Days Access the following lessons for the Geometry Unit. *Please note, this unit may take a minute or two to download* 

Standards Addressed in the Unit  
2.G.1 Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces. Identify triangles, quadrilaterals, pentagons, hexagons, and cubes. 2.G.2 Partition a rectangle into rows and columns of samesize squares and count to find the total number of them. 2.OA.2 Fluently add and subtract within 20 using mental strategies.^{2} By end of Grade 2, know from memory all sums of two onedigit numbers. 2.MD.7 Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m. Link to CCSS Unpacking Document 