AT LAST! - I think I've found the solution.
To stop others having to go through what I did (making three large wikis that all had to be rebuilt from scratch), here is an instant guide which should help...
Thanks to Mary the Moodle Fairy.
Simple Instructions for Understanding Wikis in Moodle 2.0+
The 'spirit' of a wiki is to allow anyone to contribute to it. However wikis can be made which are editable only by an individual (e.g. teacher) but viewable by all. The key is that one has to use a collaborative wiki to do this. Being able to do this negates the Moodle 'book' module from what I can see. Read on...
In Moodle 1.9, settings for Wikis were different. There used to be three wiki types:
- Teacher or Trainer
- Student (Individual student or trainee).
Things changed from Moodle 2.0 which offers only two types of wiki:
Confusion can arise from the help box in Moodle 2.0+, which pops up when the user asks for information about the difference between an individual and a collaborative wiki viz:
The culprit is the statement in relation to the individual wiki:
'everyone has their own wiki which only they can edit'.
What the box does not tell you (which in my view it should), is that INDIVIDUAL WIKIS CAN ONLY BE VIEWED BY THE INDIVIDUAL AND THE TEACHER ALONE. If the teacher makes an individual wiki, students will not be able to see it. The words 'individual' and 'collaborative' refer to who can view the wiki, not who can edit it!
So: if you want to make a wiki which is viewable by all, but editable only by an individual (i.e. the teacher), you need to make a COLLABORATIVE wiki ...then edit the permissions section for that collaborative wiki as described in the summary table below.
Student only, to see and contribute to wiki individually
Teacher only to contribute to wiki, but viewable by students as well.
Teacher and students to be able to see and contribute to wiki
When you first set your wiki up, make it an Individual wiki. Set groups as required.
Set up a Collaborative wiki (otherwise students won't be able to see it), but then remove student permission to edit after you have set up the wiki. Do this by clicking on the wiki and then going to:
and removing the 'Student' role from 'Create new wiki pages' row.
Set up a Collaborative wiki with groups as required.
Collaborative wikis don't have to be collaborative, and you might want this. Don't use an individual wiki unless you want to be the only person who can see it.
It would be great in the future if it was possible to change an individual wiki into a collaborative one (and vice versa) after the wiki had been made.
One thing that still confuses me is that in Settings>Wiki administration>Permissions, 'Create new wiki pages' exists, but not 'Edit wiki page'.
I hope I've got all this right. - Open to comments.