Log into your Blackboard course and click on the Discussion Board link in the course menu.

You will now see a list of forums in the course discussion board. Click on the name of the forum you wish to access.

You will now see a list of threads within the forum.  Click on the thread you wish to reply to.

All the posts in the thread will appear on screen. At the bottom of the post you wish to reply to, click the Reply link to reply to the post.

You will now see a textbox where you can type your reply:

1. Subject: Enter a subject for the post here.
2. Message: In the textbox, type in the body of the post.
3. Attach File: Click on the Browse Local Files button to attach a file to the post.
4. When finished, click the Submit button.

The thread and post will now appear in the forum list.