What shifts in format and delivery will you make to ensure that your audience receives your message?

Imagine you must give a presentation to a group of executives in an office. Weeks before the big day, you spend time building and rehearsing the presentation and making crucial decisions not only about the content, but also the delivery. Will you wear a suit and a dress shirt, use technology to project figures and charts, define important words or will the executives already know the terms? The answers to these questions will help you develop an appropriate relationship with your audience, making them more receptive to your message.
Now imagine you must explain the same business concepts from your presentation to a group of high school students. All those important questions you previously answered may now require different answers. Discuss how your presentation to the new audience will change from the original. What will you add? What will you remove? What will you adjust and how? What shifts in format and delivery will you make to ensure that your audience receives your message?