This is a fluency worksheet to help students practice finding the volume of rectangular prisms using the LxWxH formula. All figures are unlabeled but filled with unit cubes, so students must first find the length, width, and height by counting the cubes, and then they can solve. There are a total of 12 problems and each one includes blanks to record each measurement. This worksheet works especially well in helping students make connections between their understanding of counting unit cubes to fi