The Wiki route will not be easy but I still vote for it, also. Here is one outline scenario to help...
1) The instructor could issue a list of subtopics in a thread dedicated to this task.
2) Students could volunteer their name for the subtopic they would like to assist the instructor in preparing for the final presentation.
3)The instructor would assign the subtopics out to the students of choice. Maybe even several students could help prepare a subtopic. [This is strictly volunteer effort.]
4) The students would submit their material only to the instructor and by a given date.
5) The instructor, along with competent others, would edit the material as necessary.
6) All the subtopic material would be compiled into a coherent chapter.
7) Only now would this entire new chapter be presented to the class for study.
7b) There could be multiday transitionary period to allow final input from others, including students.
8) Test time. [Just how this is done needs some thought, too.]
9) go back to step one for next chapter.
