...main/java/org/olat/course/area/CourseAreasController.java

...a/org/olat/course/nodes/gta/ui/GTAAbstractController.java

...java/org/olat/course/nodes/gta/ui/GTACoachController.java

...ain/java/org/olat/course/nodes/gta/ui/_content/coach.html

...olat/course/nodes/gta/ui/_i18n/LocalStrings_de.properties

...olat/course/nodes/gta/ui/_i18n/LocalStrings_en.properties

src/main/java/org/olat/group/BusinessGroupService.java

src/main/java/org/olat/group/area/BGArea.java

src/main/java/org/olat/group/area/BGAreaManager.java

src/main/java/org/olat/group/area/BGAreaManagerImpl.java

...java/org/olat/group/manager/BusinessGroupServiceImpl.java

src/main/java/org/olat/group/ui/NewAreaController.java

...ain/java/org/olat/group/ui/area/BGAreaEditController.java

...in/java/org/olat/group/ui/area/GroupsToAreaDataModel.java

...a/org/olat/group/ui/area/_i18n/LocalStrings_de.properties

...a/org/olat/group/ui/area/_i18n/LocalStrings_en.properties

...rg/olat/modules/lecture/ui/TeacherRollCallController.java

...org/olat/modules/lecture/ui/TeacherRollCallDataModel.java

.../java/org/olat/modules/lecture/ui/TeacherRollCallRow.java

src/test/java/org/olat/group/test/BGAreaManagerTest.java