Groupings
From MoodleDocs
Template:Moodle 1.9In Moodle 1.9 onwards, sets of groups may be organised into groupings. Activities and resources may then be assigned to particular groupings.
To use groupings, the feature must be enabled by checking the enablegroupings box in Administration > Miscellaneous > Experimental. This will result in a groupings tab appearing on the Groups page.
In the centre of the groupings page is a "Create grouping" button.
Assigning an activity to a particular grouping
