Students will learn how to find the volume of right rectangular prisms by multiplying. You should also relay that volume is a generalization of area. Next, students should learn how to find the volume of other solids, such as a ring, by dropping the object into a right rectangular prism partially filled with liquid, then computing the change in volume. Here's a video on that. Finally, give your students this challenge.
Watch these Khan Academy videos:
Do these Khan Academy exercises:
Conclude by leading this investigation:
Speed Guess Fractions (estimate, division)
5.MD.C.5: Relate volume to the operations of multiplication and addition and solve real world and mathematical problems involving volume.