8. Presenting Lasers

Sometimes explaining something in writing may not be enough. Sometimes you may need to describe the principle of a machine or a system in an oral presentation. Do this task to see the main differences between a written and oral explanation given as a presentation.

While completing the task, you will see that in order to deliver a high-quality presentation, you need to: (1) introduce a visual before talking about it in detail, and (2) use signposting phrases. By using these transition phrases, you just indicate to your audience that you are going to comment on your following slide.

Now it is your turn to give a short three-minute presentation based on your essay from the previous task. This means that you will talk either on the principle of a laser printer, or explain how a CD player works. If you need more presentation phrases to complete the task, download this document. Submit your presentation as a video here. Remember that your file should not be bigger than 40 MB.