The privilege of making an announcement is limited to a few registered users and you might not be able to make a new announcement. If you have something that needs to be shouted out, contact a TA or the admin and let them have the contents.
If you are allowed to make announcements, make sure that you make them in the folder marked ‘ANNOUNCEMENTS’. Click on the tab marked “ADD AN ITEM” and select ‘Announcement’. Fill in the details and click on SAVE. Check that all the data you have entered is adequate and make the announcement PUBLISHED or PROTECTED as per its nature.
If you do not give an expiry date to the assignment the default expiry date is one day from the time of its beginning.