This lesson is optional because it provides additional practice drawing and identifying shapes that not all students may need. The lesson provides opportunities for students to synthesize the sorting and classifying they have done to this point. Grids are given here to encourage students to support students’ parallel lines, perpendicularity, and measurements and to support thinking about attributes of figures. In upcoming lessons, students will use these lines of reasoning to solve problems about perimeter and angle measurements.

How did you hear students use the vocabulary they have learned in previous lessons as they created and described shapes and figures in today's lesson? What can you do to encourage students to use geometric vocabulary in upcoming lessons and outside of math class?