Computer science is all around us, at school, at home, and in the community. This book gives readers the essential tools they need to understand the computer science concept of data collection. Brilliant color photographs and accessible text will engage readers and allow them to connect deeply with the concept. The computer science topic is paired with an age-appropriate curricular topic to deepen readers' learning experience and show how data collection works in the real world. In this book, readers look at data from Yellowstone National Park to learn more about the changing ecosystem there. This nonfiction book is paired with the fiction book Taylor Tracks Animals (ISBN: 9781508137764). The instructional guide on the inside front and back covers provides: Vocabulary, Background knowledge, Text-dependent questions, Whole class activities, and Independent activities.