Did you know that most animals in the world don't have backbones? Learn more about invertebrates in this engaging nonfiction book. Readers will learn all about mollusks, arthropods, arachnids, and crustaceans while being stimulated from cover to cover with its detailed images and charts, intriguing facts, and informative text. About Shell Education Rachelle Cracchiolo started the company with a friend and fellow teacher. Both were eager to share their ideas and passion for education with other classroom leaders. What began as a hobby, selling lesson plans to local stores, became a part-time job after a full day of teaching, and eventually blossomed into Teacher Created Materials. The story continued in 2004 with the launch of Shell Education and the introduction of professional resources and classroom application books designed to support Teacher Created Materials curriculum resources. Today, Teacher Created Materials and Shell Education are two of the most recognized names in educational publishing around the world. Debra J. Housel, M.A., earned a master's degree from Nazareth College of Rochester and worked as a teacher for more than a dozen years before becoming a freelance writer. She is an award-winning author and has written and/or consulted on more than 100 titles for the education market. Used Book in Good Condition