Calculating Volume Using Unit Cubes

Math with Mr. J

This educational math tutorial provides a clear, visual demonstration of how to calculate the volume of rectangular prisms using unit cubes. Hosted by Mr. J, the video bridges the gap between conceptual understanding (counting cubes) and procedural fluency (using formulas). It specifically uses two examples to demonstrate that counting cubes and using multiplication formulas yield the same results, helping students visualize what volume actually represents in three-dimensional space. The video explores two primary methods for finding volume: the base-times-height formula ($V = Bh$) and the standard length-times-width-times-height formula ($V = l \times w \times h$). For each of the two example problems, the instructor walks through both methods, showing how they connect. He explicitly defines key geometric terms like base, layers, length, width, and height, while modeling how to identify these dimensions on a 3D grid diagram. This resource is highly valuable for upper elementary and middle school classrooms introducing or reviewing geometry concepts. The use of grid-marked prisms allows students to "see" the volume rather than just memorizing numbers, making it excellent for visual learners. Teachers can use this video to transition students from concrete counting strategies to abstract algebraic formulas, or as a remediation tool for students struggling to understand what the volume formulas actually measure.