This worksheet is accompanied by a "letter from a local police department." This lesson would also need to have shape cutouts laid out in the classroom. I would begin by having a quick discussion to activate students prior knowledge about the shapes involved in this activity. I would proceed by reading the letter. Then I would go over the instructions for the worksheet. The students would then circulate around the classroom to match the description with a shape. Then, they would complete the worksheet. There is a key included at the end of the document.