I've set up my discussions page wrong and need help

N_C

I am an instructor who has come back to Canvas after several years. I set up my discussion page in a way I thought students would be able to click and reply to my post but instead they are able to make their own posts and set the time the post is allowed to be seen. What did I do wrong? How do I set the course so they post in a thread rather than make a whole new post? Thanks guys!

Gabriel33

The first two screenshots are showing the settings for a specific discussion, that's now what you want.

There are two ways to disallow students from creating new discussions:

1. In your third image, you see a "Settings" button on the top right. That would open a pop up like this:
   You want to deselect the "Create discussion topics" checkbox under student settings.
   
   
   
2. There's also that same option in the course settings, named "Let students create discussion topics". They seem to sync between themselves, so either one would work, you don't need to do both:  How do I set details for a course? - Instructure Community - 1037