Test collections are "Groups" created by Admin in their microsite
- Signin as an administrator in microsite
- Choose Site Admin->Site Groups menu to view the existing groups in microsite
- Click on Create Group button from the bottom of the page
- Enter the group name and other details about the group
Once the group is created, you can assign tests in the group while authoring the test. See Quiz Editing - Authorization
Tests/Quiz can be made available to users in your site by simply authorizing them to various groups. Users would go to the Test Collections tab (provided you have enabled this tab from Site Admin->Site Details->User Interface), and click on appropriate collections to locate the test they want to take. These tests can be taken anytime, any numberof time, and are used as practice tests.