Go through the file structure until you find the file you want. Receiving attachments works very much like the above, only backwards. Then, you will need to choose where you wish the file to be stored on your hard drive. This may sound a bit confusing at first and that is why part of the course setup includes sending your instructor an attachment, and then receiving one back. After doing this once or twice it will become much easier.
Threaded discussion is a way of carrying on a conversation with people over the Internet.
One person might post a message to the discussion, and someone may reply to that message a few hours later. Some of the instructors may choose to use this type of communication in their on-line class. You can join a threaded discussion by visiting a web page set up for that purpose. As you can see, it looks vaguely like an outline. You can read any of the comments by clicking on them.