1. Create an assignment within a course with 1 teacher and 1 student. 2. As a student, just access an assignment. 3. Check that a new record in assign_submission was created. Notice the timemodified timestamp. 4. As a teacher, go in to assignment grading view, navigate to the new grading interface for that student. 5. Check that a new record in assign_grades was created. Notice timecreated and timemodified values. They're different, timecreated > timemodified, and g.timemodified === s.timemodified.