This is a nice course you can use as a guideline to communicate more effectively during a crisis situation. It is straight-forward and short, you can easily complete it in one-go. It contains useful supplementary tools which can assist you to better organise and prepare.
It is important to have an action plan even before a crisis occurs, so that you can more efficiently respond to it once it emerges. Would had loved to see more examples of real life situations, either imaginary or perhaps past events, as well as for the assignments to potentially consist of case studies.
It appears not as many people are taking the course, so might take a while to have your assignments reviewed.