This math assessment workbook helps students master metric measurements. It guides students from millimeters to kilometers, and challenges them to weigh, measure, and convert between metric units. It presents real-world scenarios, from weighing baseballs and soccer balls to exploring liquid capacities and running distances. Engaging multiple-choice items and matching exercises helps children differentiate between customary and metric units of length, mass, and capacity. Learners practice identifying reasonable unit choices, such as ounces for a baseball or liters for a drink. Problems also challenge kids to determine how many smaller units fit into a larger unit, such as 100 centimeters in a meter. Real-life contexts, such as weighing sports equipment or planning a running distance, help learners connect the numbers to familiar situations. Common Core skills targeted are understanding relative sizes of measurement units within one system and solving word problems by converting units.