This resource is designed to teach students about decimal place value, focusing on identifying decimal places up to the thousandths. The unit begins with an introduction to terminology related to decimal places—Ones, Tenths, Hundredths, and Thousandths—along with a place value chart for reference. Students will engage with various activities to practice writing numbers in both standard and expanded forms, comparing decimals using mathematical symbols, and justifying their reasoning based on place value. Key components include guided practice exercises, collaborative group activities like card sorting, independent practice comparisons, and visual/written models to reinforce understanding. The resource concludes with an independent mastery assessment featuring a blend of direct problems and critical thinking questions that encourage explanations of concepts. Additionally, a real-world application problem challenges students to use their skills in a practical scenario.