I try to find real life examples that I've seen in the wild (maybe slightly altered, but the basic problems were all very real). I've also tried to cluster them around the same scenario, so you can build up a session easily.
Don't ignore this method because it works very well for any language and OS, for these reasons. An example is here. Also, try to use examples with I/O and significant call depth.
Don't just use little cpu-bound programs like Mandelbrot. If you take that C example, which isn't too large, and recode it in Java, that should illustrate most of your points.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.