This is an example of how you could use a graphic organizer when discussing Vertebrates and Invertebrates. This specific graphic organizer is a Venn Diagram. Graphic organizers are an aspect of effective instruction for engaging students.
Vertebrates and Invertebrates: Animal Classification Tabbed Booklet
Studying vertebrates and invertebrates makes for fun lessons for students - like this one, where kids get to make "animals" out of playdough and then stack wooden blocks on top! Read more about how to implement this lesson in this post.
Animal Classification: Vertebrates and Invertebrates