In this unit students will be engineering a systematic strategy for determining the volume of several rectangular prisms without actually being able to see them. Student groups will be given several boxes which contain different sized rectangular prisms. The lids of these boxes will have a coordinate grid which extends into all four quadrants. Each group will be given a set number of sensors for each box which they will use to find to the length, width and height of each prism. Student engineering groups will explain the systematic process they used to find these measurements and volumes, determine how to compile their data and give the coordinates of each of their sensor locations.