Unfortunately, I have not been able to find those old examples. Yesterday, it suddenly dawned on me that those entries were from about eight years ago, and I think I may have deleted that archived Moodle site as it contained actual student data that I needed to get rid of. Sorry I could not be of more help.
However, I have just tested and discovered that my latest development version of iContent can do exactly what you have re-described to Mathias just below here. The nice thing about iContent is that it not only allows the student to ask public/private questions of the tutor/teacher, but it also allows them to keep public/private notes. And, since the iContent is very similar to a slide show, the ability to create the questions and notes is based on doing so for each slide.
There is also the ability to add four types of graded questions, again based on each slide. Here is where the problem arises with this really nice plugin. It supports only four types of questions, essay, multiple choice, matching, and true/false and unfortunately the answers are never shuffled. I am working on it, but basically, I need to do a total rewrite of the question code and my time is very limited, mostly due to the problems I've been having with my eyesight.
If you are interested in trying out iContent, send me a private message and I will provide access to the development code as both a teacher and as a student so you can try it out.
