 Discussion Locking in Moodle 3.2 Forum discussions may now be locked after a certain time so that students can no longer reply to them. A new capability allows permitted users to unlock the discussions. Here is an example of a locked forum thread. When the student clicks to look at it, he sees a message that the discussion has been locked and he doesn't have a reply link to the posts. However, teachers and anyone with the capability to reply to locked discussions can unlock them simply by replying as our teacher is doing here. You enable discussion locking as a teacher when you set up a forum. So here our teacher is creating a new forum and as he decides on the settings he has the option to lock discussions after a certain time. For instance, if nobody has replied after a week, the discussion will be locked. The default is for discussions to never be locked, allowing students to contribute at any time. Students won't see if the discussion is locked or not so you may want to explain this to them in the forum description. To summarise, teachers can lock forum discussions after a period of inactivity in Moodle 3.2.