Learn about the crazy adventures of Jeff Corwin and how he became one of television's most famous naturalists. Use your unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 1660. Lexile reading level: 560L. Cambridge Discovery Education Interactive Readers are the next generation of graded readers - captivating topics, high-impact video, and interactive exercises designed to motivate and engage. Learn about the crazy adventures of Jeff Corwin and how he became one of television's most famous naturalists. Use your unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 1660. Lexile reading level: 560L.