Identifying and Classifying Polygons
This is an excellent opportunity to ask your students to look around the classroom or school for examples of polygons. Having students go on a polygon scavenger hunt will help. Encourage students to discuss the importance of having different polygons. Could we survive with only squares?
Many students interchange the terms square and rectangle. It is extremely helpful to list the properties of a square and rectangle side by side on a board for the class to see. Help students see that all squares are rectangles, but not all rectangles are squares.
Students will probably not know the term quadrilateral when they start this level. Explain that the prefix quad means four. It is also important to reassure students who ask this question that a rectangle is a specific kind of quadrilateral. Show students many different quadrilaterals that are not rectangles or squares. 
