Grades input to a class manually will have the instructor's name when you view the Gradebook History as a "Grader". Items "auto graded" do not.
If an Administrator goes into a class "Acting As" the teacher, how does the Gradebook History label this? As the Teacher... or the Admin... if a score has been changed while "Acting As"?
I'm not an Administrator and don't have the "Acting As" feature to test this myself, thus the question.