How do I delete an Announcement in my group?
Students can only delete announcements within a group. There are a couple of ways to delete an announcement.
Delete Announcement via Index Page
Find the Announcement you want to delete. Click the checkbox next to the announcement , and then click the Trash 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 .