This nonfiction reading unit (level O) focuses on the ancient dwellings of the Ancestral Pueblo people of Mesa Verde in Colorado. Students learn what archaeologists know about how the Ancestral Pueblo people lived and how archaeologists gained their information. The unit contains teacher support pages, a reading selection with supporting illustrations, and activities to guide students in close reading of the text. Students also gain practice applying content and academic vocabulary. The unit concludes with a lesson exploring text structure (Time Order) and a text-based writing activity.