In this learning activity, students will delve into metric mass measurements by converting larger units (kilograms, grams) into smaller units (grams, milligrams) and solving addition and subtraction word problems. They will begin by reviewing the metric system's hierarchy of mass units and then engage in practical exercises that involve converting measurements through worksheets. Students will work collaboratively in small groups to tackle real-life scenarios that require them to apply their knowledge of metric mass, and they will measure the mass of various items using scales. This hands-on approach aims to enhance their understanding of mass conversions and arithmetic operations, fostering confidence in their ability to apply these concepts in everyday situations. make 3-4 sentences