There are two different options for eliminating subscriptions to discussions. The easiest method is to turn off notifications for your account.
You can click on the drop-down arrow next to your name and select Notifications
Ensure that none of the boxes are checked for either email or SMS. This will make sure that you are not informed when new posts are made to your discussions. Also ensure that the “Summary of Activity” section lists Never in the drop-down menu for how often you receive the summary of activity.
The other option is to make sure that Subscribe to this thread is unchecked when you make a discussion post. We would recommend using the former solution, as this is permanent and does not require any further action on the instructor’s part.