Students are directed to a suitable on-line simulation. For example, we have a range of simulations covering mathematics and physics available on the following page: https://teaching.smp.uq.edu.au/scims/. The task sheet usually describes a set of activities that they should undertake and answer to demonstrate a good level of understanding (a grade up to a level of 5 under the university's system). An advanced task is also provided which is generally open and may require a student to explore a physical principle or construct a simulated physical device. This, together with the first sets of tasks, facilitates awarding of higher grades (6 or 7). Students are required to demonstrate a high level of conceptual understanding, and be able to communicate this is a clear and concise manner.