I have had extensive experience with Corporate classes and I know exactly what the students want. They want to be challenged with problem solving, they want real life models to work from and they want to expand their business vocabulary so they can practice in the class with the teacher via homework assignments and practical activities in the class.
If the requirement is to brush up on everyday communication for the adult student or advance High School student it is best to take a look at issues that effect people in thier day to day life experiences.