This is a chapter by chapter study guide to Nathan Aaseng's "Navajo Code Talkers" book. I use this with my intermediate level ESL students in grades 7-12. They are often fascinated by the fact that the Navajo were able to use their language to make such an important contribution to the Allied cause in WWII. I sometimes choose a handful of vocabulary words to focus on, but primarily use this for reading comprehension. Because the subject is actual historical information, it also serves to teach a history lesson that not even many native English speakers are well aware of. We build language skills while learning history which makes this one of my favorite lessons. ESL time is always limited, so any time I can find a way to teach more than one subject at the same time, it is a win-win. Other students in a regular English or history class could easily benefit from this book as well. The questions move in chronological order with the book and an answer key is included.