This 5E math lesson plan, based on the book "The Greedy Triangle" by Marilyn Burns, teaches students how to identify and classify the number of vertices and sides in 2D shapes/polygons. The lesson plan follows the 5E model (Engage, Explore, Explain, Elaborate, Evaluate) and includes suggested questions classified by Bloom's Taxonomy.Teach your students all about 2D polygons and shapes with this detailed 5E lesson plan! Engage students with a popsicle stick activity during a read-aloud of The Gre