Think of Forums as an online message board, where you, your classmates, and
your instructor can post messages to each other at any time. Depending on how
your instructor has set up the forum, you may be able to post your own
discussion message, or you may only be able to reply to the message that the
instructor posted.
A forum consists of discussion topics and replies. To get a better understanding
of the elements of a forum, let’s imagine that the forum is a large message
board that is advertising available housing for students. One area on the
board advertises the on-campus residence, while another shows area apartments
for rent. You can consider these areas as “discussion topics”.
Let's now imagine that the area for off campus housing allows students to post new topics. See how this looks in the example below. When you can post a new topic, you'll see a button that says "Add a new discussion topic". When others have already posted, as in the example, you'll see their posts listed along with the following information: The title of their post, who posted it, how many replies to the post, how many you haven't read, and the author and time of the last reply.

Now let's imagine that the other area of the message board, the one for on-campus housing, does not allow students to post new topics. Students can only reply to the original topic. That message board might look like the one shown below. Notice that there is no "Add a new discussion topic" button. It shows the original topic and then all the replies to the topic below that. If a student wants to participate in this discussion s/he will click on "Reply" on the message s/he is responding to.

To enter a forum you will click on the link to the forum from the home page of your course. Here is what those links might look like on your course home page:

When you are ready to post to a forum, you will click on the link "Add a new discussion topic." After clicking that link, you will see a form asking you to enter a "Subject". The subject will be the link that people will see on the main forum page. Make it short and descriptive so people will know what your message is about.
Below the subject is the area for your Message. In this box you'll enter the details of your message. There are editing buttons on this box, that you can use to format your message. Below the message box is an area for you to choose to subscribe to the forum. Forum subscription is described in more detail later on this page. There is a button that lets you add an attachment to your message. And the last button lets you post your message.

Every time someone responds to a discussion post, their response will get added to the list of responses below the “parent” (the first discussion started) post. You can choose to view these discussions and responses as a nested forum, as a flat forum, or as a threaded forum, by selecting an option from the drop down box. The options are shown in the examples below.
The "Nested Forum" style shows each reply indented below the post it is responding to. This is a good option to use if you want to see all the posts listed in full.
The "Flat Forum" style shows all replies in the order that they were posted directly below the parent post.
The "Threaded Forum" type shows the parent post and the heading and author for each reply listed below. You would use this if you didn't want to see all the posts listed in full. This method requires more clicking.
If you are replying or adding to something that a
classmate or your instructor has said, you will want to use the "Reply" link
rather than adding a new discussion post. In the picture below you can see the
"Reply link shown at the bottom right of the post.

When you are subscribed to a forum it means that you will be sent email copies of every post in that forum (email copies are sent about 30 minutes after the post was first written in the course discussion forum). Sometimes this can be helpful and other times it can be annoying.
You can
usually choose whether or not you want to be subscribed to each forum. However,
sometimes your instructor will force subscription on a particular forum (usually
on the News Forum) and the choice to subscribe or unsubscribe is taken away.
Everyone in the class will get email copies of posts to that forum.
NOTE: You also have the option of subscribing to a forum at the time of posting
to it. Just above the "Post to forum" button you will see a drop-down list of
subscription options. You can choose whether you want to be subscribed (send me
email copies) or unsubscribed (I don't want email copies).
To get to your profile from your course home page, click on the word "Profile" in the Administration block on the left side of the page. Click on the Edit Profile tab. In your profile settings there are a few different options for managing forum posts in your course.
Email Digest Type: This setting allows you to determine how you want the forum posts to come to you.
No digest: each post will come to you in its own, separate email.
Complete: on each day there are new posts in the forum, you will receive one email listing all the day’s posts in full.
Subjects: on each day there are new posts in the forum, you will receive one email listing all the subject heading of the day’s posts.
Forum auto-subscribe: This will set the default setting for the subscription feature. As described previously, each time you submit a post in a forum, you have the option to be automatically subscribed to that forum as soon as you click the “Post to forum” button. The selections in forum auto-subscribe will set the default settings show above in the Forum post options diagram.
If you’ve chosen the option to track your posts (in your Profile), you’ll be able to see not only the total number of posts to a forum, but also how many posts you have not yet read. This is one of the easiest ways to track new posts. When you have tracking on, you can scan your course home page and you will see new posts listed right next to the forum name. In the example below, you see a snapshot of the links down the center of a home page and it shows there are "4 unread posts" in the forum "Module 3 Q&A". This means that there are 4 new posts in that forum since the last time you read the forum. You can simply click on the words "4 unread posts" to go directly to those forum posts.

When you are already inside a forum you will see your posts tracked in the Unread column. For example, in the discussion shown below, there were 3 replies to the "Moodle training manual" post, and there are 4 posts that are unread. This means that you have not read the original post (1) or any of the replies to that post (3). 1 + 3 = 4 unread posts.

To open your unread posts, click on the number in the unread column. To view all the posts in the discussion topic, click on the link in the Discussion column. To clear your list of all unread posts, click on the checkmark at the very top.
Clicking on “Forums” from the Activity block of your course homepage (some courses may not have an Activity block), will display a list of all the forums in your course, along with your option status. An example, with descriptions of each option, is shown below.