Why use it?
A wiki is a collection of collaboratively authored web pages. It can be set up for the whole class, for groups or for individual student use. As changes are made to the wiki, a history is kept where old versions can be viewed and restored, if necessary.
Step 1: Add a Wiki
Go to the course page and Turn editing on. Scroll to the section where you want your Wiki to be displayed, click Add an activity or resource and pick Wiki.
Step 2: Settings
Tip: Click on the question mark icon 
next to any setting to display extra help or click on Moodle Docs for this page link at the bottom of each page in Moodle for accessing context-specific documentation.
General
Provide a meaningful Wiki name. Add a Description and select the Wiki mode:
Collaborative for all (or groups of students) to work on.
Individual for private wikis.
Provide a First page name, leave the other settings to default for a whole class wiki and Save and display.
Note: If you are setting up group wikis, you will need to have Groups in your course and Group mode enabled in the activity Common module settings.
Step 3: Use a Wiki
New page
When you open the wiki for the first time, you are prompted to create the first page with the name you gave it during set up. At this stage you can change the default format of HTML which is recommended for most purposes.
Click Create page to continue.
Edit a wiki page
Add text using the text editor.
When you have added text, scroll down to add tags (these will be useful to find topics on a large wiki). Click Save or Preview.
Tabs
One you have added the initial page to the wiki, you are returned to the main wiki page.
At the top of the wiki page you will see the following tabs:
Comments – users can view and add comments.
History – records all changes and is the page from which previous versions can be compared (and restored).
Map – shows the structure of the wiki.
Files – lists any files that have been attached to wiki pages. By default, only teachers can add files.
Administration – provides a means of tidying up wikis e.g. removing pages that are not linked (orphaned).
Adding a new page
To add a new page to a wiki, select Edit on the initial page and add the title of the new page surrounded by double square brackets e.g. [[Lecture 1]] and Save.
Once the new page link is saved, the page title appears as a link. Click new page link to continue to create the page.
Use History to compare changes
Once the wiki is in use and changes are made, you can use History to compare versions of a page. Open the relevant page of the wiki and click the History tab.
This shows the different versions and who has created them. Click Compare selected to see the details.
The versions are presented as below. To revert to an earlier version click Restore (to the right of the version number).
