Anyone can learn computer science, even at the elementary school level. This book delves into the essential computer science concept of problem decomposition using age-appropriate language and colorful illustrations. A meaningful storyline is paired with an accessible curricular topic to engage and excite readers. This book introduces readers to a relatable character and familiar situation, which demonstrates how problem decomposition is used in everyday life. Rafi is writing a history paper and needs to break down his research by finding different sources. This fiction book is paired with the nonfiction book Which Sources Should I Use? (ISBN: 9781538353110). The instructional guide on the inside front and back covers provides: Vocabulary, Background knowledge, Text-dependent questions, Whole class activities, and Independent activities.