When you have finished the model, put an aluminium star in a position which best approximates the position of your school in the catchment. Synthesising Discuss human dependence on, and use of, the natural resources within the catchment. Ask students to evaluate the model using the criteria you will be using when you assess their models at the end of the unit. Gauge, through questioning, their understanding of how to create a model of a water catchment area. Students write the procedure for constructing the model.
Students begin to plan their own catchment model.