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. Humans have never been content to just stay on the ground. Learn about the history of flight from the early planes of the Wright Brothers to the thrilling sport of BASE jumping. Use your unique code in the book to access the online reader, complete with videos and interactive exercises. Word count: 2810. Lexile Reading Level: 1030L.