Do not underestimate the power of the dark slide.

Yes, there is one. A dark side of PowerPoint I mean. It can be a tad dominant (like Vader). In fact, some presentations look as if the speaker has thought only about what they could show in PowerPoint, instead of what they wanted to say.

All the books I know that deal with preparing presentations say that you should first identify your audience and goals, and then generate content and structure. Creating visuals comes after that and should be one of the last things you do. And yet I see a shocking number of students who, when asked to prepare a presentation, immediately start PowerPoint, Keynote or even Prezi. This is beginning to annoy me, so I asked myself: what would happen if I told my students that the projector was broken, and they would have to improvise?

I tried this a while ago: they improvised.

For this particular lesson I had asked my students to prepare a presentation in groups of two, using slides, just like they always did. This time when  they came in, however, I told them that there was a problem with the projector and that they would have to come up with a creative solution. I gave the group 15 minutes to prepare. The results were not only educational, they were spectacular.

One student used her partner as a prop. She explained the aerodynamics of speed skating and made him assume different speed skating positions to show what she meant. She was thrilled to have a movable 3D model on a 1:1 scale to help her make things clear. Between the lines it became audibly clear, by the way, that maintaining a certain knee angle for a long time is not necessarily very comfortable.

Another student made three people from the audience perform as passenger aircraft , flying from Amsterdam to New York in formation (arms wide, propeller sounds, pilot banter), slowly moving through the room together. They managed to land safely one by one.

Some groups found out that the slides that they had made were pointless and that the presentation worked just as well, or better, without them. They certainly noticed that the audience were listening quite intently to what they were saying.

The thing is, not only did we prove that life without slides actually exists, but also everybody in that group still remembers exactly all the presentations we had that day. Of course my spectacularly innovative didactics may have played a role, but I like to think that most of the presentations simply had more impact than they would have had if they had used slides.

Of course PowerPoint is not a useless tool; it can show in a flash what would otherwise take you hours to explain. But it is just that: a tool. One of many. The presentation is not what you show, the presentation is you, and there are several moments in any presentation when you as the presenter may want the audience’s full attention, without being distracted by PowerPoint. Then you might use that most wonderful of features in PowerPoint: letter B on your keyboard.

Hitting letter  B will make the screen go black, which will make everybody focus on you (I call it B for Bob). Anything you say now will be consumed like hamburgers by a starving man. Trust me and try this; and I promise that the power of the dark slide will be with you. Always.

Oh, and you should have seen the look on my students’ faces when, after our class had finished, the next group came in and started the projector, which was working perfectly well…

Author: Bob

Bob’s teaching career started at Nijenrode University, where he taught business English to students dressed either in expensive suits or track gear, who would literally jump in and out of his classroom through the window. Thankfully, it was located on the ground floor. After two years, the quickly growing Netherlands Institute of Tourism and Transport Studies employed him, first as a teacher of English, later as head of the English department. Nine years later, Delft University of Technology, which was dealing with more and more international students, was looking for a skills teacher who could teach in Dutch and in English. Since then, Bob has had the best job a skills teacher can have. He teaches students from all faculties: from Aerospace Engineering to Architecture and everything in between. Bob is head of the English department, he teaches Academic Skills, Intercultural Communication and English as a Foreign Language and he is co-author of Presentation Techniques (isbn 978 90 469 03650), available at

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