By default, any course created in Moodle is hidden from students when it is first created. This allows you to take your time in building your course without being concerned over what your students will and won’t see. When you want to have your course visible to students, you must mark it as available.
- In the course that you want to make available, find the
block on the right side of the page (it should be near the top). - Find the
option. If it is listed in red, your course is not yet available to students. Click the
under
to enable it. - Click the
button to save your changes and make your course available.

It’s possible to add an attachment to an announcement, but if you’re trying to get a file out to all your students, it may be a better idea to just upload it to your course page. You can use the news forum to announce that the file has been added and tell your students where it can be found.