The Treat Ungraded as 0's option should be permanent or at least have the ability to save it as such. The way it is now makes no sense at all, who gets a passing mark for a course if they only completed a fraction of the course? For example, I have someone who did not complete the course and only completed 3 of the chapter quizzes, each weighted at 2%. However, in the grade book, the students final mark appears as 86% without that option checked. The students are also getting confused as to what their final mark is because it keep changing based on whether or not the option is checked, which then gets unchecked when I log out.