This resource is designed to help students understand how to translate numbers between standard form, expanded form, and word form through a themed exercise related to library organization. It includes an example with a book code, prompting students to explain the value of digits in the context of the number 4,258. The first task requires students to fill in the forms for the number of books in a Children's section (2,793), while the second task involves a new shipment of books (1,065), where students must also provide standard and expanded forms. Additionally, students engage in activities matching standard, expanded, and word forms of different book inventory numbers, culminating in an official inventory log. Finally, a challenge encourages creativity as students create their own 4-digit inventory number.