Setting up the impression armamentarium

A newly hired dental assistant asks you for help in setting up the impression armamentarium for a crown and bridge procedure. She admits that although she has been a dental assistant for 5 years, her previous employer used only rubber base impression materials for final impressions, and she is unsure of the procedure, or the difference in setting up the materials.

She knows both impression systems are a bit complex but is not clear on what the benefits of each are. How would you respond?