Couple of questions about the new gradebook: Will teachers have the ability to delete or hide columns without going back to the assignment and deleting the assignment. Sometimes I don't need a grade book column, but I don't want the whole assignment to go away. Also . . . is there any way to delineate in the grade book between quarters or semesters? I don't want to have an average for the whole year. I need to be able to assess a single semester.