This Fluency Activity is a part of the Lesson 4, Unit 2, Grade K. This is a preparatory fluency activity intended to review the previous lesson's work with rectangles and prepare students to name and identify hexagons and circles in a similar manner. This is similar to Lesson 3, but with rectangles. Identify shapes as rectangles or not rectangles, from simple to complex, by starting with the exemplar of each shape, then the non-examples, and then the variants.