What Is a 3 - 2 - 1? The idea is to give students a chance to summarize some key ideas, rethink them in order to focus on those that they are most intrigued by, and. Click here to print (PDF file): Venn Diagram: Horizontal Venn Diagram for Comparing and Contrasting Two Items Graphic organizers help students construct meaning. Your students can visualize how ideas fit together with these reproducibles. Comparing Graphic Organizer to help keep you and your students organized. Sign up for our free weekly newsletter and receive. top education news, lesson ideas, teaching tips and more! *.