This unit focuses on problem solving with geometry and measurement. Students will measure and estimate liquid volumes and masses. They will solve one-step word problems involving masses or volumes using the four operations. Building on previous geometry content from earlier grades, they categorize shapes based on shared attributes. Students solve real world and mathematical problems involving perimeters of polygons. Students represent data with scaled graphs, and solve one-and two-step word problems using information presented in scaled graphs. Students will revisit addition and subtraction with 1000, and multiplication and division within 100 to demonstrate accurate and efficient use of strategies (fluency).