In this mini-project, students will get practice calculating the volume of a rectangular prism, performing unit conversions and creating a bar graph to answer the question "How Much of Your Home Water Usage Could be Supplied by Rainfall?" I love that this question also gets students wondering and curious about water sustainability, water barrels and their own water usage.Over the course of this mini-project, students will read about the Cape Town water crisis of 2018, plan how they will collect