In the LMS you administer the accounts of the students yourself. Students may be members of different groups. You can arrange these groups yourself. Groups can be nested, like folders in a tree on your computer. When you select 'students' from the main menu, the group tree is shown in the submenu on the left. The group tree can be expanded and collapsed with the plus and minus icons. If you have permissions to see all student groups, you have an option to see a list of 'All students'. Students that are not a member of any group can be found in the list 'Unassigned'.