We often have to tell learners many different things at different times.
What time the lessons are? What assignments are due and when? When there are special events, guest speakers, additional support? How to get an extension on that essay? Room changes, teacher changes… you know the kind of thing.
We may send them letters, give them notes, tell them verbally in the classroom, mention it to them in the corridor, e-mail them, post it to Facebook or Twitter, etc….
We may think we’ve told them but they may have been away that day, not listening or plain just forgot!
In order to ensure that not only they know what you’ve told them, but also ensure you know what you’ve told them, it makes a lot of sense to create a virtual noticeboard on the VLE for all the news about the course. And of course in following years you have a record of what news you posted in the previous year.