Now that's a great experiment! I think the use of Powerpoint is useful and mandated under certain circumstances (e.g. if you want to show experimental data), bu

Now that's a great experiment! I think the use of Powerpoint is useful and mandated under certain circumstances (e.g. if you want to show experimental data), but when discussing a concept with your peers, working on a whiteboard is better for various reasons: 1. It forces you to think more about what you want to say and how you're going to write it down beforehand. 2. It sets a uniform pace for your presentation (writing stuff down is harder than advancing slides) 3. It lets your audience follow the train of thought that lead you to the results your presenting and allows your content to unfold before their eyes. 4. It invites participation and allows for easy modification and adaption of your content during your presentation (try that with Powerpoint). That said, structuring a good whiteboard talk/presentation is hard work too and I've seen many people (including professors) fail at it.