I just had a teacher contact me about this option in Quizzes. I had never seen the Lock this Quiz Now option before. I have not been able to find any information on it in the Guides. Has anyone used this option? What exactly does it do? How do you unlock a quiz? The teacher who called me had the quiz unlocked, but didn't want the students to be able to take it any more so he was trying to lock it because he couldn't unpublish it. The option to Lock this Quiz Now was not working for him. Anyone know why? I would love any feedback on this subject. And if anyone knows if there is a Canvas Guide on this, I would love to know that too.