How do I delete an announcement in a group?
Students can only delete their announcements within a group. You can delete an announcement on the Announcements page or within an individual announcement.
In Group Navigation, click the Announcements link.
Delete Announcement via Index Page
Find the Announcement you want to delete. Click the checkbox next to the announcement , and then click the Delete button .
Note: You can select multiple announcements at a time.
Delete Announcement via Individual Announcement
You can also delete an announcement by opening the individual announcement. Click the Announcement title link.
Open Settings Menu
Click the settings icon  and click the Delete link .
Click the OK button.