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PBS
Pbs Learning Media: Volume of Shapes Composed of Right Rectangular Prisms
This video gives a clear demonstration of how to figure the volume of rectangular prisms, and of nonoverlapping rectangular prisms. The video is accompanied by an activity and a student handout.
Virtual Nerd
Virtual Nerd: How Do You Find the Volume of a Rectangular Prism?
Explains how to calculate the volume of a rectangular prism using its formula. [4:00]
Other
Brian Huebner: Finding the Volume of Composite Figures
This YouTube video is designed for a flipped classroom, providing instruction about finding the volume of non-overlapping prisms.