The typical approach for documenting and playing back the systems requirements are data-flow diagrams (DFDs). Initial DFDs may seem strange to business folks. I have found that once they understand the standard symbols, then they find DFDs are better than just reading pages of documentation.
Have you seen DFDs prior to this course? Have you created DFDs?
Do you find DFDs to be a good way to present the requirements? Or are they confusing?