(fill in depending on response from students).ġ.What type of units are needed to measure volume? Why do we use that unit instead of others such as.How is multiplying the dimensions to find the volume similar to using the layers approach?.Explain why your method works to find volume.

How can we use multiplication to find the total number of cubes in a rectangular prism?.How can we use multiplication to find the number of cubes in one layer of a rectangular prism?.What does it mean to find the volume of a prism?.Students may refer to volume devoid of units of any kind and not realize the importance of the type of unit.Students may not visualize a prism as consisting of layers of cubes.Students may confuse measuring volume with measuring surface area.review the units used when determining volume of rectangular prisms (cubes or cubic units).connect the method of multiplying the dimensions to finding the number of cubes in the base layer (l x w) and.learn a method for finding the volume of a rectangular prism based on the number of layers in the prism.Measurement and Data: Standard 5.MD Understand concepts of volume and relate volume to multiplication and addition. 3-by-4-by-5 rectangular prisms, 1 per group of 3–4 studentsĬubic units, rectangular prism, volume Common Core State Standards for Mathematics.Refer to the demographics table in Classroom Discussions: Seeing Math Discourse in Action, Grades K–6, page xxxvi. The method of multiplying the dimensions is then connected to the idea of layers. If students know the number of cubes in one layer, they can multiply that amount by the number of layers, or height of the rectangular prism. One goal of the lesson is to help students articulate how volume can be determined by finding the number of cubes in each layer of a prism. They share their methods with each other and discuss similarities and differences between the methods. In this lesson, students continue their work on developing a method for determining the volume of any rectangular prism. Students started to devise methods for finding the volume of any rectangular prism without counting. In previous lessons, students built rectangular prisms using cubic units and determined the volume of the prisms by counting cubes.

Counting cubes rectangular prism