How do I delete an announcement in a group?
Students can only delete their announcements within a group. You can delete an announcement in the Announcements page or within an individual announcement.
Delete in Announcement Page

To delete an announcement from the index page, locate the announcement. Click the Options icon [1] and click the Delete link [2].
To delete multiple announcements at a time, click the checkbox next to the announcements you want to delete [3] and click the Delete icon [4].