Some of you have commented about the lighting of the video, and so I would like to know if this is a general issue, or if you think there is a certain part of the video where the lighting is really ugly. I would like to know more precisely what do you mean, because I want to improve the quality of my next videos.

If you wish to give me more precise advices I will be very pleased (one of my purposes is to learn as much as possible).

And by the way, I suspected that the Blender community was big… but after 3000 visits to the video in less than 24 hours from all over the world I'm really surprised. I think this is a success for the Blender developers. My sincere congratulations to them, you achieved a nice goal with this way of doing things creating this huge community.

Thank you!!!!!!

Perhaps Toon can take your files and update the lighting and re-render them.

That would be exceptional use of open approaches… the professor/grad student nail down the visual representation and some one else can step in help out by polishing it a bit [that harsh lighting... perhaps a nice fade in or a hitchcock zoom]

I agree with you that it is very important to visualize what is going on in Math or Physics or any classes, which will help students understand well.

Also I tried using Blender Game Engine in an academic way, in order to show how the PID control algorithm works. After designing a PID controller for an inverted pendulum as a simple example, it was controlled on BGE standing the pole stably at:
http://hanspg.web.fc2.com/Pages/simu/pole_standing.html