Instructional media is an important tool for presenting information. Many people use PowerPoint to create their instructional media, in the form of a slide show. It is important that the media is easy to read and follow or you will lose your audience. It is not a good idea to have yellow text on a white background- it is hard to see. And it is also not a good idea to have words and sentences that are not aligned- they are hard to follow.
In teaching, instructional media is used all of the time. Most lectures have a supplemental PowerPoint so that students can both listen to the lecture and follow along on the screen. It is also used for visual representation of an idea.
Below, I have an example of a good, easy to read and follow page of text and also a bad, hard to read and follow page of text. As you can probably see, the first page is more appealing and would keep your attention for a longer period of time (which is the goal).
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