In many cases, a simulation model is not a one-off exercise. Instead, it is intended for use on an ongoing basis. This usually means having at least two end-users (after all, people do move on and job titles do change). We have taught hundreds of students how to use simulation models of all types and have developed a curriculum that delivers exactly what end users need to know quickly and effectively. Besides, we have a great time with teaching, as we love a chance to get to interact with our clients.