volume and water collection Here students will be asked to calculate the volume of different shapes and depths of ponds which will be illustrated here.They will record how much each one will decrease sewer overflow. Then, they will make recommendations about what kind of pond would be most useful in Mill Creek. Initially, they will make recommendations based only on volume. Then, they will be asked to think of other factors that could influence the choice of a pond eg potential recreational uses potential habitat uses safety considerations visual appeal Students can then have a debate and make a video clip of their discussion for the web