For activities with important visual aids. Unit: 5.1 Finding Volume (Grade 5). 5.1 Finding Volume Unit Goals Students find the volume of right rectangular prisms and solid figures composed of two right rectangular prisms. Section A Goals Describe volume as the space taken up by a solid object. Measure the volume of a rectangular prism by finding the number of unit cubes needed to fill it. Use the layered structure in a rectangular prism to find volume. Section B Goals Describe the calculations from the previous section as $\text{length} \times \text{width} \times \text{height}$ or $\text{area of the base} \times \text{height}$. Find volume using $\text{length} \times \te