I am using quizzes on a bi-weekly basis. I usually use essay questions, for which there is no key option, but instead 'General Answer Comments'. I have been using these as a key. Based on the responses to student answers, I find myself editing my quiz key before (or even after) it is published at the end of the quiz period. It is unclear to me if my edited answers will be seen by all students or only those who start taking the quiz after I've made the edits.
Can someone clarify how this all works?