The third and highest level of Crabtree Connections consists of 18 titles. These nonfiction titles address geography, history, and science subject content. The series includes three texts written at different reading levels on the same subject matter and in different writing styles to expose readers to different types of nonfiction text. The Level Three collection introduces readers to biography, persuasive, and instruction text types. Clear and concise information and engaging images combine to capture the reader's attention.