Most young people can be concentrated for a short period of time, wile older people and those who are most highly educated are better able to listen to a presentation or read a report, for example, for extended period of time. It's helpful for the audience if you build variety into your communication, but it is even more crucial for the young and less educated people. Young people respond well to visual stimuli, such as pictures, video and models, web based communications or PowerPoint presentations can work well for the young people as well. Uses of examples
A good way to help you audience understand your message is to give examples to illustrate your explanations. Use examples that draw on the lives of your listeners, or reflect their experience and interests. It is preferable that you should use the examples from different ethnic groups and make it applicable to all types of people and both men and women. If any of your presentations include handouts or any type of written documents and PowerPoint presentations then make sure that the font is easy to read and the size of the text is large for those that are partially sighted.
Accessibility There are different types of issues to consider when preparing verbal presentation: for example, some individuals may have special needs that you should be aware of. You may need to adapt the environment so that the students with special needs sit in appropriate positions in the room. people with hearing difficulties who lip read would prefer the person that is saying something to stand some where they can see their lips so that its easy for that person to read their lips.
You should always stand facing the lip reader to give them the maximum opportunity to receive the message. If you have audience with disability problems, such as wheelchair users, the layout of the room should be considered. If your presentation involves any sort of group activities you might also consider grouping the audiences so that the person with special needs works with the cooperative group members. Readability You have to make sure that you adopt the language suitable for this audience.
Younger and less educated people will expect you to use simple language but older and more educated people will expect to use some technically terms and prases. Interest You have to know first how interested your audience or reader is about the topic you communicate about. If they are already very keen to hear what you have to say to them then you don't have to work to hard, but sometimes your audience will need to be won over.
One thing you could do is to get to the point quickly, and explain how the topic is relevant to the audience. There are a few instances where humour is appropriate for a professional business document except maybe in advertising or some other marketing communication. A joke is a good way to start your presentation and to engage your audience and get them on you side. But if the joke is offensive or not funny then you might have a lot to make up throughout the presentation. This is why I chose not to say a joke.